IMHO, too much upper body strength is not the problem, its the reliance on that upper body strength over proper alignment and principles that's the problem. Okay, at least for me. It taks so much less muscle if I take their balance than if I don't.
Those applying their waa against me also have the problem. Because of my size (6'4", 220 lbs.) they tend to try to give me more, instead of giving me less.
When neither they, nor I, focus on my size, we both tend to do much better.