Frankly; I don't understand how not signing Henderson and then drafting McLemore helps our team. I'd keep Hendo and draft Noel in a heartbeat.
If Noel is taken then I'm not sure what I'd do. IMHO Marcus Smart is the clear BPA after Noel; i think he'll be one of the few PG's strong enough to compete with Derrick Rose in the years ahead.
But I'd keep Hendo if possible. Dude is tough.