@RyanWithWiiM I would like to throw my hat in this ring as someone who would like to see some of this extra functionality added, particularly options to group and control other WiiM devices from the Ultra screen.
I have an Ultra connected to a turntable and CD player in a central room of my house, and 5 other WiiM devices across three floors. The ability to easily use the Ultra as a central control station for audio throughout my home is something I envisioned when I got all these units, and having to pull out the app any time I want to group devices is a big drawback, especially when it comes to guests and others in my home easily controlling the system in this way.
Maybe this use case is uncommon, but it may be more prevalent than what the other comments in this thread would suggest given multiroom audio is a key function of these devices in all their marketing materials. Extra functionality for the Ultra screen (above and beyond UI and visual optimizations that others have mentioned), like the ability to group and control other WiiMs, would certainly bolster its position as the flagship WiiM Streamer.