Unless the player has an excellent shot at becoming an absolute stud, this trade would be a terrible one.
What players in the NBA are worth a mid-round 1st and a future 1st (on a still rebuilding team)?
Jrue Holiday had an All Star appearance on his ledger and is a solid young PG, but his trade to the Pelican is deemed as a coup.
Ainge, reportedly, doesn't believe there's much difference between 1-4 and 5-8, and (I project) 7-8 is the best that this deal can get. Again, if you're giving up 2 1st for 1 1st (1 player), the player better be worth it.