My BLU is totally NQ yet I get asked to go VW on it quite often. I don't get asked to come BLU to do damage, I (or most of BLUs) get invited to proc. Otherwise another WAR SAM MNK RNG or COR could take that spot and kill as fast or even faster, right?
Awhile ago I made an Uptala shout and had this BLU in full DD mode. He was boasting how he's topping up the parse, I was getting tells from people pissed about BLU spells remain unprocced for the whole of that 5-7min fights. One thing is you can easy top parse in random shout, other thing is, you're topping parse because other people actually do their job and work on their procs when their turn is up.
Doing damage is nice, but that's not why I get invited to VW. Personally I think Tourbillion and restoring one or all temps as soon as possible is why I'm there in the first place. Otherwise, again, why not bring another WAR instead?
Don't get me wrong, I'm not trying to take sides here, it's just my point of view. BLU can be played in many ways, depending on personal preferences. It's just, in case of VW, it's so damn frustratingly broken with proc spell setting/resetting hindering your DPS
