I'm not. In fact, it runs a lot better than some of the other multiplatform games I own. Yes, sometimes it dips down during the SP but not very often. The only instances it's dropped online is sometimes during the orbital blast and once my entire match was about 15 fps the entire match. That only happened once, though.
I do see some teleporting enemies once in a while online but that's connection lag, not frame rate.
Anyone else experience a fairly smooth running game?