It's definitely still a playoff quality team without Rondo.
The Celtics have been under-performing all year long. There is a lot more quality on this roster than their current record shows. They are a good solid playoff team without Rondo. Just not a title contender.
Nothing has changed regarding the title. Weren't likely to win it with Rondo; aren't likely to win it without. People seem to be forgetting the first 43 games of the season. Rondo wasn't going to put this group over the top.
Lots of good trends in the game today. Ride it out, see who steps up, see how the backcourt defense improves and add a piece inside if you need to from the bargain bin.
Blowing it up only serves to validate the hopelessness of people who love Rondo more than the Celtics. Ainge isn't paid to think that way, and he won't.