Sorry, I would much much much rather they find a way to balance clan vs IS. I'm one of those players who isn't so locked up on lore.
To me, asymmetric teams would only be fun for the overpowered mechs. What would you rather be: the ants or the boot? It's much more fun to walk around in the OP mech and get lots of kills than it is to run around in the underpowered mech and depend on the swarm to win. We all know from PUGs that the swarm is highly unpredictable.
Asymmetric teams would only be fun for the clans, in my opinion. So I would rather have balance and equal teams.
EDIT: That said, I'm HUGELY in favor of uneven teams in an attack/defend sort of game mode, where the attacking side has more mechs and the fortified side has less. That would add great variety. But I don't want to see it uneven purely based on clan vs IS tech.
Edited by EJT, 06 January 2014 - 08:18 PM.