Yea, it would have been nice to keep getting variety. Taken and SIVA helped a bit, but not much. The only events that were really effected were Strikes, you were never sure which mobs you'd have to clear out. So don't get me wrong, I'd love new enemies. But there is still a lot to be explored with the current ones out there, and I'd rather see more variations and dynamic encounters with them than just more cannon fodder.