I'd like for higher tech EXE and CA bases to actually provide an advantage over their low tech counterparts. In theory it's currently possible to build t16 EXE bases, but realistically no one could possibly gather enough of the (event only) undead miners.
I'd suggest either giving base hulls an innate extraction and suitability (cap) bonus when used by EXE/CA or adding EXE/CA locked items that do the same (go go new T16 extractors!).

I can already hear people complaining about this being OP because certain individuals have way too many base slots, but I don't think the game should be balanced around these people (and ofc they can still be slightly less efficient than low tech spammage).