Looking back at this again I missed that there is a "menu" key but only a 1.25U one. Any chance of getting a 1U for 7U bottom row? I love having system/code over super but menu would be really cool as well. Just a thought as I was coming back to look at this set again.
Imo, a better course of action would be to change 1.25u Menu to Fn as is standard in most sets (currently, there is no 1.25u Fn key in base). The thing is that the Menu legend has a pretty narrow meaning and isn't very versatile (Fn could work as Menu, but not the other way around).
Have you had time to think about this?
Also, would you consider adding R3 PgUp, R4 PgDn keys for 65%/75% support? They're not in the base kit, and there's no extension kit either, which is a problem because I generally don't buy sets that don't include these keys. Usually designers that opt to include 1.5u Supers include these as well (and often even give them priority over the Supers).
If I were you, I'd drop the second 2.25u Shift in favor of these two keys, as 660-style layouts (which are the only ones that require 2× 2.25u Shift) seem to have sharply fallen off in popularity over the past ~5 years.
Anyway, I gotta say this colorway's been growing on me lately. Very easy on the eyes. (It might also have something to do with a friend of mine recently buying a very similar looking jacket, heh.) Not a huge fan of the alt alphas, though, even though they do look more like the inspiration jacket.