I'd say let's meet in the middle first and see how it goes.
Make ladders more exclusive, 3 or 4 slots for the smaller ones too (or all, simply)
I see why ladders are a cool feature, just its a problem that every pure 2h or pole, or many shielders can bring them, even archers with 1 slot bows and 1 quiver.. or xbowmen etc..
with 3 slots ladders, no ranged can carry them without loosing their ranged ability, and pole and 2h would nerf themselves to inferior weapons if they choose to bring ladders.
With 4 slots ladders, only the most hardcore teamplayer with a self sacrificing mind would bring them. Players sacrificing themselves for the team or multi is pretty rare...
Anyhow I think such a change would make roofcamping a rare occurence, rather than every single map.. Perhaps.