It is a good problem to have, though they are already really young and don't need more youth.
If no trade for "star" materializes, and at this stage I doubt it does, I expect them to take Dunn @3, one shooter, with a home run shot (Maker?) with the other 2 firsts and a bunch of Foreign draft 'n stash prospects late.
Ainge will also sell a couple of their picks for money and trade for future picks. While I agree the top of the draft is rather week. Picks 14-45 is relatively solid should all have a chance for roles on teams. There'll be teams who see a player who fits their roster and will be jumping back in to the draft.