The 2015 draft was very weak. Only 8 of the 32 players picked after Hunter are still (or have ever been) in the league, and only 35 in total, with several just barely clinging on to a career (Okafor being the most noteworthy). I’d be willing to bet that by the time the draft is four years past, so next year, fewer than half will be around. That feels historically low. Maybe not as bad as whichever draft graced us with Moiso, but it was a rough year to have four picks.
At least Ainge and co were able to quickly separate the wheat from the chaff post-draft. Rozier has been very valuable, and quickly moving on from the others meant they didn’t take on salary or roster space that could have been greatly better utilized.