A Possible Alternative to Twin Fortresses
Is the twin fortress technology OP? That's debatable...it is tier 8 and has a chain of pre-reqs, but once obtained it is pretty damn powerful...even a human player who knows what they are doing is going to have a hard time countering 2 SBs supported by an ankylon and a pittance of other supporing ships/structures...
Of course, SBs can usually be bypassed or isolated from a supporting fleet but in smaller games with only 2-4 players, that is not always possible...
In any case, I'm not particularly fond of this Loyalist technology...I would rather see a different type of research entity modifier that allows SBs to have more upgrades...so instead of having 2 SBs, the loyalists could put 10 or 12 upgrades on their SBs...I know some share this viewpoint but I figured I'd put it out on the open....

