I bought a ScubaPro Hydros Pro when they were still relatively new. It is the best integrated BCD I have used. But, I only use it when I'm teaching OW classes.
For everything else, I use a back plate and wing.
I think @froop hit the nail on the head when he said that if you can't roll along your body axis and hold whatever orientation you want, then you are probably over-weighted in the rig you are using. Or, if you were using a twinset, that extra weight, including the manifold and extra 1st stage regulator, was messing with you. I have done a fair bit of diving with double 120s (aka twin 15 liters). I can comfortably dive those also in whatever orientation I want. But, that is more of an acquired skill than diving a back plate and wing with a single tank.
I think back inflate is back inflate, whether it's an integrated BCD or a wing. But, with a disclaimer:
If an integrated BCD has a much larger lift capacity (which they usually do), then a comparison to a wing may not be fair.
The Hydros Pro is 40# of lift (in bigger sizes, anyway). The wings I use are 18# in warm water and 30# in cold water. The bigger lift means it has a bigger air bladder. Which in turn means the air inside can get further away from your center of gravity. That can make it a little harder to control for things like venting gas and for maintaining an orientation other than belly-down.
Also, specific to the Hydros Pro, unless they have fixed the design, one quirk they have is that the bungees that go through from one side to the other to pull the air bladder sides in tight, when it doesn't have too much air in it, are not fixed in the middle. Because those bungees are not fixed, they can slide from side to side. That means that if you roll onto your side with a Hydros Pro, all the air can go to the high side of the air bladder, pulling the bungee all the way to that side. Then, when you roll back to belly-down the bungees are no longer centered. That will make one side of the wing be smaller than the other, holding less air. You will then feel like your BCD is trying to roll you back on your side. It's easy enough to reach back and pull it back to centered. But, some people don't like that.
If you get a back plate setup that gets your single tank as close to your center of gravity as possible, and use a wing no bigger than you NEED, and you are correctly weighted, you should feel like you can do anything you want. Hold any orientation you want. My single tank rig makes me feel almost like I'm diving with no BCD on at all and I love it!