I don't think they're good at PG if they let Isaiah go and draft after Smart. Smart is much too limited as a player.
I also question whether Jackson, who is the presumptive pick, is a fit on their team with Crowder, Brown and possibly Hayward in front of him. That seems like a lot.
If it was me, I take the best player in the draft in Fultz, which frees me up to maneuver with Isaiah even this season and I sign Hayward. I'd be much more comfortable walking away from IT if Fultz looked good coming off the bench with Smart. Not so much if I have pick 8 and Smart only.