Nice set! The main area of improvement I can see is on kitting.
-both alt mods and alt alphas assume that someone is purchasing base and are lacking a lot of keys for those who may want to pair mods with alt alphas
-sb kit is unnecessarily bloated and can either be split or simplified
-40s kit seems designed to fit both alt mods and base - just pick one, since 40s users should be pairing your 40s kit with alt alphas, not base
There are other, smaller details on kitting - feel free to reach out to me on discord. I'm sure with some kitting changes it can be a fantastic set!