Oh lord that's a lot of changes! Uh, um, uh--

King-whateverers first I guess!

• Most of the minion King-likes sat at 5, with the Champions sitting at 6-7 due to their various extra bonuses. If there was a champion whose moveset was exactly King (minus the castling), I would expect that to cost 5, and also expect that the required balancing should raise it up to 6, with the existing King-and-more pieces going up to 7-8.
• Among minions: Transparency is apparently a net positive according to your logic. I dunno if transparency plus [+]-shaped swap attacks is worth a whole point, but I suppose it's good enough to leave be for time being.
  • The problem with putting RoyalGuard++ and Butterfly+++ at 6, though, is that then Ghost++ has to be 7, and I dunno if that's too expensive, especially compared to Tiger+++ which is now also 7.
• Among champions: Base Chastity 5... well, Chastity has a powerful negative effect holding it back, so this seems almost fine-ish.
• Since I don't see that you've nerfed any of the other cheap King-like champions (EarthElemental, Pride, WaterElemental new base, Siren+ after tiershift), setting Guardian base to 6 and dropping the movement range by 1 would be fair alongside those pieces, I think, since they all cost 6 as well. Whereas if you had raised them up to 7, then Guardian's moveset should remain the same at 7.

Changed minions:

• Promoting Skeletons up to +++ is an interesting idea. I assume this would be a normal "reach the back row" promotion? This does make an interesting possible exploit with any tier Lich if you can get a clear shot at the back row, since you can then summon Skeletons for 4 morale and have them instantly promote up to +++ for a net gain of 2 morale. I dunno what kind of board position would really allow that which isn't already a won position, however.
  • Getting to promote lesser Skels up to +++ does make actually paying full price for the Skel+++ up front feel really bad though. Would a buff down to 5 cost make sense? (This would also ironically help with the Lich exploit because each summoned Skel is now only +1 morale instead of +2)
• Who even runs Archer anyway? Tier shift up definitely helps, but it still feels inadequate. Maybe try something really radical for Archer+++ and give them diagonal attacks, at a cost of 4 or 5?
• Tombstone might actually be playable now with the proposed changes. I'll have to get back to you on that later. Net 2 cost Skeletons (for a while) seems pretty good.
• Salamander vs Basilisk is now firmly in Basilisk's favor. Apparently Petrify vs Destroy really is worth a whole point, which makes sense anyway since you need at least 1 extra move to kill a stoned unit, vs a Destroyed one being gone already.
  • Basilisk++ vs Salamander++... both cost 4 and have 2 speed, but destroy > petrify as discussed above, so maybe something should be done to help the higher Basilisks out more? Dragon++ vs FireEle++ isn't that big a difference in terms of what you get post-promotion...
• Templar is one of those pieces that is probably priced correctly, but that I don't really know what kind of army wants the effect. Also it feels like it should promote to Paladin (it's obviously cut from the same cloth), but doesn't. Maybe sideways-oriented pieces are just not as good as up-and-down ones? (it'd be hard to argue for, but 2/3/5/6 or 2/4/5/6 would at least make the choice interesting)
• Drake+ at 4 makes Skeleton+++ at 6 look pretty bad too.
• The Swordsman vs Skeleton comparison has already been brought up, so I won't go over that here. If current Swordsman+++ at 4 is too oppressive, you could either bump it up to 5 cost (none of the other 5-cost king-like minions have a promote, so it's fair-ish), or else use one of the older designs by using the current sword++ template and adding 2-range move-only on forward and sideways directions.
• Bat capture should be vampire drain for meme purposes and extra insult, since it's an extremely low likelihood event (remember original Shieldman?)
• New Hoplite+++ ideas... i dunno how hard it would be to code this to work properly, but if the diagonal move-only squares can become "Move Only OR Block 1 Attack from this square", maybe that would work. Side armor would work too, but then it looks too similar to Duelist+++.
• Phantasm is not on this list, but I've always thought it to be a terrible piece. It's fine that its moveset synergizes poorly with rook/bishop rushes (as if those armies need the help, lol), but what else can we do to make it work? Promote to Wisp?????? (lolno)
• (LifeStone at flat [Lose 5 morale on death]?)
• Random, wild, totally out-of-the-blue idea with no practicality whatsoever: What if Hostages died on turn 60 of the game if it goes that far? (for fairness, after Black's turn 60 both die at the same time, so that hostage vs hostage becomes a draw instead of White wins).

Champions:

• Now that we have a way to cause transparency on other pieces (NullMage), maybe transparency should be denoted more visibly in some way (yellow glow, actual transparency on the piece, etc)? Otherwise it might be too easy to forget that a piece is now transparent and make a transparency-related blunder.
• FireMage should be renamed "MeteorMage" - unless you think people will confuse it with Comet's freezing effects?
• Harpy+++ nerf seems unnecessary. is 7 range vs 6 really that much more powerful that it costs 2 points instead of 1? (or is it because of the added teleswaps)
• Finally a Prince buff! I've been hoping for this one for a while. There are ways of balancing prince beyond its up-front cost if necessary (see relevant thread on kong forum).
• Champions not listed above:
  • Temperance wants to be a powerful forking piece to force trades but costs too much to be able to make those trades effectively. Maybe 7/9/11/13 or 8/10/12/14 would be a better cost sequence for the piece.
  • demon++/+++ back down to 15/17? no reason, although aquarius+++ is also 16 so one of those two pieces should probably cost less
  • stonemage is another one of those sideways-oriented pieces that i feel are difficult to use well
  • there should be a minion that promotes to demon or rook. we have spearman i suppose but berserker doesn't quite cut the mustard sometimes
  • there should be a champion with bishop + knight abilities like how demon is rook + knight (after a fashion). i suppose we have archbishop but that doesn't exactly count
  • wrath might be slightly too expensive right now vis-a-vis thundermage. gaining tempo from the king lightning is nice but thundermage gets king-like for cheaper AND has longer range thunders. if wrath is more of a "mix-it-up" type champion, which its ability seems to imply, then it should get better melee powers (or augmented 2 range passive, hue hue hue).

Good lord this is over 1,200 words. At this rate i might as well make the 100-word-per-piece guide somebody asked for