I like Kyrie Irving a lot and believe he will be a tremendous PG in the league but the last thing I want to do at this point is burn what could be our final Title run with the big 3 by trading for a rookie PG.
If Rondo hadn't dislocated his elbow, that would have IMO been a much more competitive MIA series. also, I think Danny deserves another shot at fixing the C position thus putting us right in line for a serious run next season...(crossing fingers that there is no extended bargaining dispute, that is).
as for trading Rondo, I think the only trade I would seriously consider at this point is CP3. he also is an injury risk at this point, but he runs an offense + he can score and defend. he also has that edge to his game (like Rondo) that many talented players lack...