I totally agree with you OP, I hate the "comic relief" abilities Scoundrel's have that are part of their main rotation like blaster whip for dirty fighting and sucker punch for scrapper. The scattergun is the iconic weapon of the class but we barely use it. If there is one simple change I would like to see it's an animation replacer for blaster whip, changing it to a scattergun animation. I simply don't play scrapper because of the sucker punch animation.
I doubt it will ever get changed though, and some people prefer the silliness. Personally I don't like the silliness since Scoundrel is the only advanced class to get "comic relief" abilities as part of their rotations. I don't appreciate having to be the joke class simply because I want to play a dps smugger that isn't a gunslinger.