The lower limit of x2 for conquest at least prevents half the server from leaving when Conquest pops up (while the other half leeches), but no one wants to play the same conquest map for 90-150 minutes straight. Can you limit Conquest maps to a single 30 min round?
I'm glad Conquest is getting some love again, since I still believe it has the potential to be the superior game mode (combining the best aspects of siege and battle without the worst aspects of either). The Siege Camp spawn on the Helm's Deep map last night was a glorious bloodbath for like 20 mins straight; cav crisscrossing through the camp, melee hiding in tents to surprise the cav, archers raining down arrows, bodies piled high around the campfire; good times. However, the current multiplier system is still not a good fit with the game mode. If we must have a multiplier system, why not start defense at x5 and offense at x1, but offense gains a multi when they cap a spawn (and defenses loses a multi)? That way, the rewards would actually be tied to good tactics. On certain maps/team makeups, offense has zero chance to win the map, but they should still have a chance at decent rewards for capping some spawns.
The current system just encourages people to leech if they happen to have an x5 when conquest pops up, but they have to go. Your prior multi from a siege map shouldn't have any bearing on your conquest rewards.