They are already limit to 4, what more do you want? A single starbase prevents the novaliths from winning the game, and even a TEC loyalist player shouldn't get novaliths in twenty five minutes unless at the high AI levels, which are named Cruel and Vicious for a reason.

Mod them to require 100 tactical slots = no superweapons 

Here is ur turn off switch and please stop whining

What RTSs have you played? I seem to remember super weapons being much more powerful in games like Command and Conquer with no option to disable them.