At some point, the Celtics have to make a trade. If your core is IT4, Horford, and you want to win now, you have to trade the pick. Maybe its right before the draft, but you MUST trade the pick.
You cannot simultaneously continue to stock pile assets, draft 18 year olds, and compete for a Title. Either you trade the pick this summer, or next year you trade Horford or IT4 and go in wait for LeBron and the Warriors to get too old to compete.
The salaries that will be required when IT4, AB, and Smart come up for new contracts will not allow the C's to re-sign all those guys. Its also not fair to Horford and IT4 to continue surrounding them with rookies. They deserve to win.
So, either trade the pick or trade away your best players next year. The time is coming. The clock is running out on the current path for Ainge. At some point in the not so distant future he will have to decide.