Unless, of course, a way to fight the blight is discovered and we free BT!
Obviously, that's extremely doubtful, though. Not enough nobles to populate an unblighted BT, and blighted BT is too small and lacks the potential it had in the past where tons of colonies could be created almost any day.
My wish is that it dies gloriously.
Without temples and lords? I don't think they will be that effective at the preaching game. Also, I doubt their purpose is to screw with us directly at present, so I would be surprised to see daimon worship inspired revolts anytime soon.
Lord bonus is what, +0.000000000000001% per day? It's really bad. As for temples, you don't actually get a penalty for not having a temple. You just get penalties if you have a temple and it's not big enough.