Honestly having a BLU that could queue as a tank or dps or healer would be a good thing for the game.

"Damn we have been in queue for ages"
"Hold on i'll spec my BLU tank and we can just get another DPS."

It would certainly cut down on queue times.

SE is worried that people won't know how to spec. Which is really a slap in the face to think their player base is so stupid they can't figure stuff out. This level of hand holding is just atrocious. Its no different than a Ninja not knowing their Mudras before they queue and rabbiting all the time. That person learns really quickly how useless they were/are and learns or chooses a different job that isn't so difficult for them.