I brought a tape measure to the game. there is no doubt odd rows have more knee room than even numbered rows (in lower bowl). back in the early days, I was in an even row. I had my cup holders removed because they were bothersome. I noticed the folks in front of me appeared to have no troubles. so I came early one game and sat in their seats and I was like dang.
it's just in the design of the stadium. it could have been corrected (averaged out) by using shims where the seats attach to the concrete. they must know, I've told my account rep several times during seat relocation. it still could be fixed, but they choose not to.