Rondo played some great basketball during his stay in Boston. We watched one of the most exciting players perform his magic especially during the big 3 era. It was fun! "Those were the days my friend....." They were great!!!
However, having watched Rondo since the big 3 departure it's obvious he would never lead us to another title. He may in Dallas. Like other posters have mentioned, his value goes way up when he's surrounded by All Stars. We are at least two more tanking seasons away from having two all stars on our team. And, by that time Rondo would have been well past his peak. If he hasn't passed it already.
In my opinion this is a great pick up for Dallas, but not such a great loss for the Celtics. I haven't watched a lot of Celtics basketball this year....too tough to watch. Maybe with new players they might be better. I doubt they will get worse. They picked up a rim protector they desperately needed and they lose a player who can be a major handicap when forced to shoot the ball. He hasn't been the go to guy in the fourth quarter.
I am a bit surprised more of us don't see this is as a great deal for the Celtics. Most everyone is looking at it from Dallas' viewpoint. Rondo has so much going against him. He has a ton of mileage on him. Thought his foot was going to give out on his years ago. Now, he has his knee that must not be 100%. Jeff Green plays better without Rondo. Now everyone will get to handle the ball. Maybe someone did the analytics and found he's not worth what he would be asking for. Other GM's felt the same way.