Can i just say that I sort of like this idea.

I want a game mode in which you start with a titan and a new one is not buildable if you lose it. so you get a titan early but its a real risk to use it

You would have to reworkd the advent rebel titan, as you would never get the benefit of its ult as the flagship

I just think the flag ship should have at least some visual distinction and able to get experience like the rest of them,as well as benefit from the upgrades,as it is the regular endgame kol is considerably better then the flagship kol.