The only GLARING issue is the lack of 2 way comm. No way to see a volume level on the display. No way to track what source the room is playing...if say an "ALL HOUSE PARTY MODE" is activated from another location.
I've got two big projects on the go with B&K multiroom stuff and RK3/K4 for control.
...couple a thumb tacks and a stick of double sided tape should hold this baby up...