First turn on developer options by goin into Device preferences. Then About then scroll to bottom and click repeatedly on Android TV OS build till you see message on bottom of screen that your only a few clicks away from being a developer.
Click back one menu. You will now see Developer options section.
Under Developer options scroll down to:
Window animation scale. Should be set to 1x. Change to .5x
Transition animation scale same change to .5x
Animator duration scale same change to .5x
This will increase the responsiveness of the GUI.
I might be new to the forum but I've been a Tech since 1998.
Cheers Enjoy,