I don't understand why they got rid of the F-keys.
The keyboard is a beast; no one is using it for portability. Why make it smaller by losing a row of keys? (Do the opposite — add another couple of rows, for kicks! Moonlander adds a column [1])
Same for Bluetooth — I don't get the attraction — when are you taking your giant keyboard away from your desk? If you never needed to plug it in, that would be slightly better, but it still needs to be charged. Even if it's only a few ms of extra latency, what's the upside?
This is more idiosyncratic, but I put a Magic Trackpad in the center of the Advantage2 [2] — highly recommended — so losing that center piece is worse for me.
It's kind of interesting, probably the majority of split-keyboards lack F-keys. Heck, a bunch of them even don't have numeric keys, relying on layering instead: https://github.com/diimdeep/awesome-split-keyboards