Only thing that would be negative would be letting the clutch back in too quickly, same effect as a good dollop of brakes. Excessive clutch wear if you kept doing it but if you blip the throttle to speed the engine up as you let in the clutch then its not a problem.
It pains me to watch youtube videos of riders who don't blip the throttle when changing down, they must get through a new clutch every year and a new rear tyre every 3k's!
