Higher framerate is better, but unfortunately the C922 has terrible quality when set to 60fps. As @owlnonymous mentioned above, you can try setting them to 40FPS to see if you can keep both the quality and some of the smoothness. You might also want to mess with the exposure settings for the camera source in OBS.
As far as resolution, you're not going to notice much difference when capturing a vertically oriented playfield at 1080p vs 720p, because it's going to get scaled down to fit your 1280x720 stream anyway.
I really hope the next gen of webcams can do 60fps with high quality! I personally upgraded to the Sony CX-405 that everyone recommends above. The difference is night and day -- the downside being that you need a capture card to grab the video.
I'm using the Elgato HD60 Pro capture card. But I couldn't get it working with Xsplit -- it captured at 5fps. I jumped through a lot of hoops and got it working by downgrading the drivers, but Xsplit feels so bloated to me anyway so I decided to switch to OBS. The Elgato works perfectly in OBS, but in the future I'll go with Avermedia as @kdeangelo suggests!
The one feature I miss from Xsplit is the Whiteboard source for drawing on the stream. I tried various 'drawing on the screen' apps, but OBS doesn't like to capture transparent windows. The one I managed to get working was Smoothboard Air. You draw on your desktop, but OBS captures it with a white background, and you can apply a chroma key filter on it.