Nasser got bigger after that, but so did his stomach. Looked better there.
I also think he looked better there...
But you are giving in to the ironage fallacy that just because a pro is more muscular he automatically has a worse stomach or worse proportions or something like that. Simply put, having TOO MUCH MUSCLE is a flaw in and of itself. Even if Lee Haney managed to preserve his shape and symmetry at 300 pounds he would LOOK WORSE, because too much muscle doesn't look good.
But ironagers will always grasp at straws stating it is stomach problems or symmetry problems or something like that. Meanwhile at 270, Nasser maintained a very good midsection. His muscle was simply a bit overwhelming at that point and was not something to aspire to, in comparison to the picture above.