Thanks PADAM!! Using the Canon glass has also been weird, between firmware etc. but it seems metabones has updated enough to make it work out. Thanks for the advice!
Merrill, I definitely agree with Dave! My position is a little different. I'm working for the MLB which has more of a documentary style focus on the ballpark. However, great action shots are also expected, they're just not the primary focus. So for my purposes the A7rII has worked pretty well. I put it in continuous wide focus mode and the tracking does a good job. If I continue in the sports field I'll definitely be looking to switch back to Canon for the 1DX II. I switched systems a while back though, 3 years now, so who knows? Maybe the newer Sony will start closing the gap. Tough because I'm totally invested in E mount now.