No matter how good anyone thinks Dunn is gonna be he won't be better then Isaiah. Isaiah is probably the 5th best pg in the league
That's a big call man.
Dunn might be the best defensive player in this draft (certainly the best defensive guard). He's probably top 3 in the draft as a playmaker and ball handler, if not higher. He's probably a top 3 athlete among all guards in this draft too.
He's also a very capable scorer, and his jumpshot is improving - especially from midrange, but even his three point percentages were respectable this year.
He's got the athleticism of Terry Rozier, the defensive ability of Marcus Smart, and the playmaking/ball handling skills if Isaiah Thomas if not better. If he develops a capable jumper (which he's already starting to do) he could be a legit superstar.
Dunn already look frightenintly like a young Dwyane Wade. He has similar height, length, strength and athleticism. He has the same "attack the basket" mentality with a similarly competent midrange game, and like Wade he has legit PG skills. Hard for me to envision him being anything less then a star.