Customize Integrations (e.g. AppleTV)

Would be nice if we could customize the built-in Integrations.

I want to add aditional scripts (buttons) in the AppleTV integration.

Also I want to be able to change the volume control to an ir soundbar.

I know that this is already possible using activities but then I loose the nice picture and also the availability to switch the apps (ok I can add these as custom buttons).

For the apps it would be nice if I could remove apps not required from the selection.