I just started using it with my 7D2. I never had issues keeping the shutter half pressed when tracking and shooting bursts. After so many years I had trouble getting used to it but I forced myself to use it and now I like it.
I still like to shoot stills with the shutter so I set up the AF-ON so AI Servo kicks in. I set up the * button so AI Servo, 65 point AF and zone 6 kick in. This is for emergency BIF. I mentioned this before. I wish Canon would add drive mode to the Detail Set so I could keep the camera on Single Shooting and when either BB are pressed it would switch to High Speed Continuous.
I also noticed my keeper rate improved setting the IS in my 100-400II to mode 3. At least I think it did. I have to experiment more. Weather is nice but it has been overcast pretty much every day.