So aside from waiting on the drop to happen, is there anything else you're planning on changing about the set?
To my eyes, the bottom row on a TKL having a majority of keys with blue legends might look colour-wise asymmetrical in an unpleasant way? The way you have the ergodox set colours laid out so no two of the same colour are near each other should apply elsewhere as well.
I'm sorry, I know I'm late with this kind of commentary, but I only decided recently I'd be going in on this buy.
#1 Keycount wise I do not see any changes necessary at this point, I might however add a Minila kit as that board is very popular over in Asia, and they do love SA. Aside from that, I might come around to the legends from time to time, look at them with fresh eyes, e.g. considering making the numpad enter legend vertical to have the color be spread a bit more, and I do like the look of it. Or changing the git's INIT command to CHECKOUT when I do it vertically. So mostly just waiting and finetuning.
#2 I am very happy with the bottom row, I feel with the one red key on each side, or even just blue on winkeyless boards it has a good color balance. I tried using purple on the META/FUNC key. On the ergodox, the 'bottom row' of the alphas cluster is not really the bottom of the board, the thumbs cluster to the left/right of it sortof continues it and having that all blue as well would be too much blue. So going all christmas tree there is the way to go.
#3 No problem, feedback is always welcome, but I'll be shutting the gate for sure like 1 month ahead of the drop. Should still be plenty of time, after which I would only fix technical errors. I'll be going over the kits once a month or so making sure each key has its purpose and doublecheck with layouts that nothing is missing. If you have a special layout that I claim to be covered, please go over it and approve it!