I think this is the biggest problem. Bish seem to like to work together, knights and rooks not so much. To a lot of players on the Rooks and Knits, it seems that the only way to play is to rack up kills, and the quickest and easiest way is best. Vulching, picking and so on.
I dont think the "win the war" types dominate play any more. Of course that was the "hey day" of the game. Big squads going head to head pushing for the win. Of course that generated far more fights which kept the "fighter" guys busy/happy, and opened room for those looking to pick and vulch for easy kill counts. With the loss of that team aspect pushing for the win on the Rook, Knit side it leaves the Bish as the only team really "going for it!" , which adds to the issue of few fights on the rook knit front.
Bringing back ENY really wont slow the Bish down all that much as they just will continue to work together for that next base. It will get them pissin' and moaning about the handicap and make the defence on the Rook/Knit fronts a bit easier as they should had the better equipment, but not by much.