I do like the mode, and the above can appealing if you are wanting to play for the long haul, but I think it should be on a separate server.
I still find the rounds a bit too long, or like the time limit should be scaled per map, based on their difficulty (or average time it takes to take the whole lot) for attackers.
The good thing about battle and straight siege is the wallowing x1'er can change their fate and gain multi with a heroic charge, sneaky manoeuvres, or good teamwork, but conquest is more of a slog, for minimum 15/20 mins.