I think we have to remember how young Doncic is, and that despite his youth, he's ranked as the best player in Europe. I've watched about 5 of his games this year, and to be honest, I just don't see a problem with his ability to create his own offense. There are times when it looks like he has the ball on a rubberband. I've seen him make people fall down while trying to stay in front of him. Now I grant you that the NBA will be tougher, but a lot of people had similar doubts about Bogdanovic, and I think he's proven that he's an NBA player.
However, that doesn't mean I wouldn't take Ayton over him. The main reason is that I think a player like Ayton comes along every 10 years or so. If you get the chance to get him, you should. But I don't have to discredit Doncic to justify taking Ayton. I don't think you can go wrong with either of them. I have Ayton and Doncic in tier one. I have Jackson, Bagley, and Porter in tier two. I have Mikal Bridges, Young, Bamba, and Carter in tier three.
I struggled with whether to put Miles Bridges in the third tier, but my gut tells me that he won't be as effective in the NBA. Could be wrong about him though. He relies a lot on his athleticism and strength in college, and those will be nullified to some extent in the NBA. But if he can prove to be an efficient outside threat, then he moves up a notch. Right now he's fairly consistent with the open shot, but not so much when highly contested. Which is fine, except he has a tendency to force those shots at times. He is a good defender though. Not as good as Mikal, but then I think he may be the best in college.
By the way, since I mentioned Bog's, I've been amazed with his ability to work his way through traffic and get to the basket. he's almost Hardenesque. Harden always amazed me with how he could get to the basket through traffic. Tyreke is another one. Don't know how they do it, but it's an amazing talent.