First of all: if your expert roulette takes 45 minutes you have way more issues than 1 bad Brd. That has been said already. Even if I wouldn't use WM I would beat even most of the melee dps I met in dungeons, just because the least players know how to play their job. So if those Brds were THAT bad they clearly didn't know their job at all and it's not only because WM wasn't used. I once met a Brd using WM, wildly spamming buttons, Sidewinder without DoTs, no Straight Shot at all, AoE skills on single target, and so on..
To that other person saying "TP problems are pretty much nonexistent on WM", you clearly never played Bard CORRECTLY. Otherwise you'd run out of TP after about 3:30 min. Sure takes longer as without WM, but the current gear having THAT amounts of Sks it is impossible to NOT run out of TP.