I think this whole series would have benefitted from letting Omni-Man suffer a lot more. He's made out to be this invincible force that nobody can handle. That's not fun at all. I don't like it when it's the hero, and I don't like it for villians either.
With Thanos, yes... he was pretty tough. But at least he actually is beaten at one point even in Infinity War (until that freaking moron Star Lord screws things up). And prior to that beating, he had to suffer a huge loss.
But with Omni-Man... he never gets whats coming to him. Not even close. I feel like his battle with the Guardians of the Globe should have been much more difficult for him. That was the point at which the whole series soured for me. Reminded me of why I hate Superman as a character. Too overpowered... too boring.