Analysis largely depends on piece cost, which isn't listed. This is my hot take:

• Siren+++ could become meta.
• Archer+++ Instead of turning it into a Princess, why not just have it attack 1 space forward or move sideways?
• Hoplite+++ might define the meta eventually. Armored Militia has got to be powerful.
• RoyalGuard+++ has worse mobility but better defense. Its new moves thematically make more sense. I like this one.
• Spearman+++ looks like it would help move all the oppression to a few lanes.
• Frostmages are cancer.
• Beacon+++ What's the point of this?... ... I imagine scary things.
• Valkyrie+++ will become meta. The improved mobility alone makes it easier to abuse its far reaching attacks.
  WaterElemental+++ looks strong.
  Pyromancer+++ looks strong.