Wade can still play - he doesn't have it in him probably to carry a team anymore, but if he can take on a role as Butler's #2 he remains very dangerous offensively.
Rondo put up some of the best stats of his career last year.
There's a lack of shooting, but all three of those guys are very good players with exceptional talent. With the right bigs, that could be a more dangerous team then it's given credit for.
Wade and Rondo are both tough guys who love the big stage. Those guys were built for the playoffs.
Where are they going to get the right bigs? They lost Noah and Gasol, and there is nobody decent left to sign, and they have no assets worth trading for a good big man. In addition, not only are Rondo, Wade and Butler all poor perimeter shooters, they each need the ball in their hands all the time. This lineup is primed for disaster.
Wade got paid and is going home, so he's ok with it. He doesn't care about the on court success. Rondo wasn't getting any good offers from anyone else so he's ok with it. Butler is going to want out asap.