I’m kinda torn on this thing. I watched the LTT Wanshow segment about it and it seems cool. But also seems very gimmicky or like the entire thing could have been just an app. It will definitely be interesting to see how this technology grows and changes in the coming years if it really takes off. I know they sold out a bunch of their preorders so that might mean good things to come.
If your camera supports it you can try registering faces to prioritize the auto focus for a few of the standout players.
If your camera doesn’t have any ibis and you’re shooting with a crop at 200mm I think maybe you’re right that 1600 isn’t quite fast enough. You could go higher or maybe try out a monopod to help stabilize.
There should be a tracking AF option where you can select a focus point and then let the camera track the point but your camera may not have that option either.
If no tracking AF try using a larger point. My camera calls it zone AF where it focuses on one of the 9 boxes made by the lines of thirds.
It could also be a “get good” situation where you just have to anticipate a little of what might happen and try to be ready for shots a few seconds ahead of time. Practice makes perfect after all.
I hope that maybe this helps!