with more poeple trying things like red vs blue and other such projects there is the need for them too stay ahead of the competion, and that does require them to try new things ( the animation) while appealling to a wider audience, so including more fight scenes. the trick is to find the balance to keep old fans happy while bringing in new ones.
anyway i see red vs blue as two diferent styles for lack of a better word, theres classic rvb (season 1-5) and contempary rvb (the rest of the seasons). both have elements i like so im not complaining too much.