One thing that i do not get is.
With the amp you can use exciting speakers to make a 4.1 setup.
But even just with the general setup of aps. I do not get why they have not implemented the ability to add a physical center channel either via a new amp which has a dedicated center channel or as par of the app just like you add a sorround you should be able to add a center which could be something like (Play:3, sonos beam, play 5 and more i am sure)