Considering some features in Wildstar seem to be inspired by GW2, it disappoints me that they didn't do anything with combos. To me, that's always been one of the better ways of encouraging and rewarding group play, but it's something that's barely been explored in MMOs. To this day, FFXI is really the only one to do a decent job with them. Using combos in that game was the difference between being able to beat harder enemies to get exp faster and having your ass handed to you, and even then, FFXI was pretty limited since people figured out which combos were the most effective and only used those few. In GW2, combos are more of something that happens accidentally and not something people tend to go out of their way to work towards, particularly since they usually have very minimal effects.