No. Although I hate the idea of a deciding set tiebreak, tiebreaks at the end of regular sets are fantastic. Especially at the end of 3rd or 4th sets where a guy who's 2 sets to love down can have a chance to keep the match going.
Deciding set tiebreaks in Majors end great matches prematurely I think, whereas in the 1st to 4th sets they can prolong them.