Assigning Activity Profile buttons to action buttons

Having activity profile buttons that can't be assigned is quite restrictive, however if you could assign another button to swap between activity profiles, it would go a long way towards fixing this.

I have my remote set up with activity A being watch TV and activity B being streaming. Both activities use the TV and Soundbar but watching TV requires the Set Top Box remote and streaming requires the Shield TV remote. When I want to change between tv and streaming remote profiles, I use channel down to switch to the streaming input or channel up to switch to the TV input because there is no need for anything to be powered on or off. The 'problem' with this approach is having to press A or B as well to switch to the correct remote profile.

Being able to add the A or B activity profile button press as part of the channel up or down actions would automate and fix this 'problem'.

My experience with the remote has generally been good but I do find you need to think a bit laterally to achieve what you want sometimes so more flexibility would be very useful.