I wouldn't mind Pierce being dealt for Smith but the Celts hanging onto KG.
The playoffs have shown me that KG actually has more in the tank than Pierce does and I also start to wonder about Pierce's conditioning.
I think a team of Smith, KG, Green, Rondo and Bradley could be very fun to watch and would also be competitive, which is the most important thing.
I think if you also deal KG, it defeats the purpose of having Smith because for me the idea would be to have KG and Smith make a sweet front court.
If you then add a sharp shooter like JJ Reddick (please get rid of Lee or Terry) and another big via the MLE like JJ Hickson, Tiago Splitter, etc this could be a pretty decent team next year.