Your base kit is missing R2 PgUp, R3 PgDn keys. They are required for 65%/75% layouts. Also, the R4 End key included in the kit is useless without them.
There's also not much point in including UK keys if they aren't going to have Russian sublegends. Currently, if you opt to use the UK keys, you end up with missing Cyrillic letters. Since molds for UK keys with Russian sublegends likely don't exist, I suggest dropping them and going back to basic 4-key ISO support (ISO Enter, 1.25u Shift, R3 \|, R4 <>).
A few other keys that can't be used for anything and should be removed:
- both of the 1.75u spacekeys (they require the set to have 40s support)
- second R4 1.25u Fn
- second R4 1u Fn
- second R4 1u Ctrl
- second R4 1u Alt
- third and fourth R4 1u Super (gotta say this is the first time I've ever seen four of the same key in a kit)
Also, Windows keys are almost universally hated/unused, so they may not be worth including either.
All in all, the kitting used to be a lot better before the update. I suggest reverting back to it. You can add the tripleshot Russian sublegends if you really want to, but keep in mind that JTK's Cyrillic molds are awfully misshapen and are a far cry from what Cyrillic lettering actually looks like.