This is something I just have just gotten use too but just came of a mix with Pro Tools and did not notice the delay,
Make a session with lets say to keep it simple 8 tracks, all eight in touch mode, start writing automation on channel one then touch fader of ch2 and there is a slight delay in the screen graphics and also the automation points, if you write on channel 1 then let go and then write again on channel 1 again the delay is not there. I’m seeing this on the Tango, Avid MC Control and also just tried it with a Frontier alpha track, all have the delay. it also happens when you jump back and forth using the select buttons. Using the mouse to move between fader on Mixer seems fine.