I wouldn't count Ainge out of anything, and the pressure really is on him right now.
I have to say that Lance is exactly the type of player we need. He's an instigator with offensive killer ability. He's actually a couple of years from his prime. He can facilitate or finish, perfect for motion O. Defense? Check. As to his maturity and approach, this is where Brad is the perfect coach.
If a trade works out, fine, but I have no problem with a 4-guard rotation of Rondo, Stephenson, Bradley, and Smart, and actually like it very, very much. Imagine them together for the next 4 years, at least. Yeah...
We're still set on PF's, and Ainge is still looking to upgrade with a veteran star big man, no doubt, but is okay with keeping Sully/Olynyk as well. There are still assets in the cupboard, after all.