I have yet to have any problems with disconnects from either faction.
I have been getting quite a few AFKers who queue up for STFs and just hang at the spawn in.
A team I was on last night ended up failing the Optional objective on the Cure because of a camping Fed player, the funny thing was this jerk never fired a single shot and was the 1st one to grab his loot and warp out after the rest of us took out the Carrier.
Well it's obviously some factional imbalance that is causing people to disconnect. The server leans a little bit too far for the Klingons, what with all of their armor and weapons. So once the server tips too far one faction falls off.
If more Feds flew the Galaxy class variants then the server would probably tip in their direction and drop our Federation captains more.