First Owens is far more than "above average" in the ring.
Also why is his gut such a focus? We don't have threads on the forum discussing Wyatt's gut.
Honestly Kevin has gotten in better shape since reaching the performance center. He appears to have dropped a few pounds, and he has also put on some muscle in his arms. A past with knee issues contributed to his physique and at this point cutting the gut out completely isn't likely in the cards, but as long as his cardio is fine(and it is excellent), and he moves well in the ring(which he clearly does), then it really shouldn't be an issue.
If Foley could get over the way he did at his size, Owens, who has all of the same intangible qualities that Foley had, should be just fine. He still looks like a guy who could kick some ass, so I don't see where the problem is. Especially when legit fight sport athletes, like Roy Nelson for example, have shown that as long as your weight doesn't reflect on your cardio then it is really a non-issue.