I'm afraid I don't have time to cover everything right now, but I've had a quick look at a few bits...

I have one question about updating the description in communities. @httr4life and I have been trying for a while to update the description on the World of Sports group that he put up when the community was first created. When you go to update it, it looks good, like it worked. But when you reload the page, it goes back to what was posted before.

I've just updated the community with a new avatar and cover image which you should be able to see. By "New avatar", I've just used the profile picture from @hive-199189 which was already there.

I did notice some strange behaviour when I made the update and then refreshed the page straight after. My suspicion with this is that the original information is stored in the State and despite the database getting updated, the State didn't refresh - I noticed that it had updated when I switched from steemitdev.com to steemit.com.

My suggestion for now would be that once you've made the update, navigate away from the page and give it a bit of time before hitting Refresh and returning again. This worked for me and there's now a smiley face in the Description.

The navigation / SEO is multi-faceted and something I've made a start on. The Primary navigation on the left (on Desktop) and bottom (on mobile) was the first thing that I introduced at the beginning of this year. There's a lot more I'd like to do around contextual searching.

As you mentioned, the search bar at the top is screwed. This functionality is separate to the main site (and coded in a different language (Python I think) ) so I've not been able to get that configured or set up on my localhost yet to work on. I tried earlier in the week but I need a Linux machine which I'll buy in the new year if my DAO proposal gets extended. If it doesn't get extended, I'll have to think about whether I want to make that investment (about £500+).

In the past, the "no-follow" was added by default on posts - so any in-page links wouldn't get followed until the post hits $20. This was to prevent people promoting their scammy sites and damaging Steemit's SEO. I think this needs adjusting.

I don't know if you saw my latest SEO experiment - that article has been indexed by Google which is a positive step.

The tag cloud is something I'm thinking about - I have an idea of how I could do it but I need to see what data's available to the page to make this work. There used to be a "popular tags" page which suggests to me that there're possibilities here.

If you do become a curator again, try my interface - https://raptor.in.ua/steemit.php - I've not worked on it much recently but it feels like this would serve your needs better.

I doubt I've covered everything you asked, apologies if not so please ask again!