It's not that simple, though. Here's a bg that just happened- almost all Blackrock on horde, but as you see, Icecrown ally has some 15k health guys.
https://imgur.com/a/qCLETMn
Predictably, the horde won and it wasn't even close:
https://imgur.com/a/AX6wO9j
Now, overall I agree that Ally is somewhat stronger after the recent changes, but I do a lot of solo queue bgs as ally and I lose a lot of the time- maybe 40% of the time. And one of the reasons is that Icecrown has a lot of 15k health guys and Warmane doesn't always put them in the low gear bracket.