I don't think we should restrict the number of GBs per stack simply because the more GBs there are in a battle, the more likely an avatar is to get killed. If you don't mind having your nobleman being handled by someone who may use them as front-line cavalry, then you're risking death. This is especially true with many of the mods which increase the difficulty of the game with better AI and garrison scripts. KOTR was already surprisingly lethal, and I expect the next game to be even more so.

That said, if the majority want a GB limit I will go along with it. I'm more impartial about the army limits beyond GB. I will accept whatever you guys agree is best for heavy cav, foot knights, etc. I prefer balanced armies anyway, so it won't impact my play style.