Oh yeah :s, your realm has that heavy imbalance(mine does too in favor of the Alliance, but it's an RP realm so no world pvp)
Though it'll likely clear up once the initial "wave" of dailies are done. If not then, then well...next patch when everyone's sitting in whatever new daily area pops up.
Out of curiosity, how much dps on average do you do in 5 man heroics? I tank them often on my DK tank, most of the time I get people dong 10k'ish with the 15% buff and I'm doing around 9k'ish(DK tanks do less damage compared to others, especially if you're timing death strike) in Zandalar heroics.
Sometimes I get "those" groups, and everyone's doing about 5k dps then complaining when it takes 15 minutes to get a boss to low health before the healer finally runs out of mana.
This ONE time though....it was a bit crazy, they weren't even a guild group, I got 3 dps from 3 different realms.....
....all doing 15-20k dps, one cat druid(20k), one hunter(16k), one ret pal(16k). That was the only time I ever had so much trouble holding thread, they just destroyed the shit out of everything.
I spent all that time leveling a mage thinking they'd do the highest damage(and for the fact that they're easy, a mage is like taking a break from the game compared to DK tanking, which I just find very frantic with all their survivability cooldowns) but that one dungeon run makes me want to roll a hunter! Or a drood!