I don’t have the patience to read all that but I agree
I think the skill cap should work as more as a soft class system
But I agree with the concept that you shouldn’t be able to be a master base builder, master medic, master whatever all at the same time.
So a soft class system could be like a combat triangle between maneuverability, combat and intelligence.
Basically you could be smart (good at skills like medic mechanic crafting etc) and fast at the expense of being spongey and weak at melee, mining and tree cutting.
You could be more tanky at the expense of less maneuverability and a skill cap on more technical skills like medic, mechanic etc… And maybe you can carry more.
You could probably think of some better class/skill cap hybrid but the basic concept is to make players need each other more, compared to being a maxed out lone wolf kosing machine that doesn’t need anyone, they’re just moving loot bags