I don't think he really would have take all her bits (well he would have but he wasn't REALLY trying to) he was just trying to haggle for a better price form a position of strength, expecting Fluttershy to start the battering process, which she did...in the opposite direction.
RD IS lazy-ish, she is perfectly eager to do anything she finds entertainging or fun, but has no patience for anything that bores her and would rather just nap.
@ Ginger, she can't do her ENTIRE job in seconds, the Ten-seconds-flat...look at just how few clouds there were, all she was doing was breaking up a few scattered wisp of clouds, I'm sure there is a LOT more to her job that requires much more effort, plus we've seen that some of the larger events require a team of Pegasi and RD is the one tht has to get them organized, prepped, all that stuff.
Aj also practices for the next rodeo when she's not working, or just finds something else that needs doing, for her her work isn't just a job to her, it's her entire livelihood and home.
Build a fool proof system, and the world will create a better fool.