Ayton's attitude questions are obvious and if he really wanted out and was going to be a disengaged Ayton this season, then hey had no choice, but I think Ayton is dramatically better than Nurkic. He's healthier, even if marginally over the last 2 years he's been much healthier over the last several.
And even Ayton's softness in the post... Ayton, statistically, blows Nurkic away as a post player, the comparison isn't even close. Nurkic is no bruiser. He is a below the rim, away from the basket, big man... who isn't particularly good away from the rim anyway. Compared to Ayton, he is a better passer, but Ayton plays primarily close to the basket. Compare Nurkic to other centers who opperate away from the hoop and his passing is very underwhelming.
If Ayton had to go, so be it, but I think one of the top priorities next off season will be replacing Nurkic as we come to realize he is borderline starter material... when healthy, and he is often not healthy.
OK. Stats. How about per36 for their careers.
Ayto--pts 19.6, tov 2.1, blk 1.2, ast 1.9, reb 12.2, ft .755%, fg .597%
Nurkic--18.3, 3.2, 1.7, 3.4, 12.8, .671, .502.
Aytons numbers are better, but not blow away numbers by any means. Ayton has better scoring percentage because of the players around him. He tended to get really easy scoring opportunities otherwise he passed out to someone else. However, his passes did not usually end up as an assist. Also, Ayton's scoring was going down, and would have gone down more this year with this roster.
Nurkic has averaged more blocks, more rebounds, and more assists. He also sets much better picks and made 43 of 119 three-point attempts last year--DA made 7 of 24.
I think the per36 numbers are a decent comparison here since they both have played starter minutes. To me, the big advantage DA has over Nurk is durability. It's not that I think Nurkic is all that great. I still think he is in the lower tier of starting centers in the NBA (as in the 20-30 range), but DA was not great either and seemed to be getting worse.