The cyrodiil combat bug, that prevents leaving combat, will cause everyone to have major breach permanently in any major battle. A fix similar to what has been done for inner beast, where it is only permanent for non-player targets would be an appropriate fix. Another great fix would be to, as suggested elsewhere, have it apply minor breach as well, opening up tanking to players that do not wish to devote a bar to sword and board.
This change will completely mess up the change to battle spirit, as 5900 resist reduction removes 9% damage mitigation, which when combined with the battle spirit change, will in fact further decrease TTK, worsening the situation.
I believe this change to be critical to this rebalancing of TTK in cyrodiil, and am extremely concerned that it might go forward.
Save us from this calamity devs! You're our only hope!