Which side are you on? Obviously on a nightly basis, Pancada is a better player in terms of mechanics and experience on controller, however Zellsis brings cohesion and energy when needed.
I lean on the side of Pancada because it's still an FPS game so mechanics >>>>. Coordination can be learned and improved more drastically especially now with an IGL in JohnQt and vocal players like zekken and sacy. I'm not considering what happened this past year as it was a sh*t show as a whole.