Yeah it's definitely worth doing even if you don't win all the time. I'm glad I have my lowbies on separate accounts, I can really turn games by playing my 4x shaman with the alts on follow. They get 1.5-2 bars per game, and keep in mind that's percentage based so it will not decrease as you get higher up.

Also, since you can queue from anywhere, if you have wait times for AV you can continue to quest or grind while you're waiting.

Of course if you're Horde on reckoning, queues are always instant or 30 seconds at the most. Kinda nice