Lots of questions above, I'll do my best to answer some / most of these.
Route128 no the app startup screen is not customizable. However this is really only expected to be shown during restart thus hopefully not to users. We would suggest customizing the front of room display background with any key user info.
Madbanzai We are working hard to deal with all problems / issues on MTR. We have limited our MTR HW partners (Zoom for example have more partners), and we are listening to the community (I try my best to be as responsive as possible, and I lead the Devices area for Teams). Please feel free to PM me with any more feedback.
beirtipol for Certified devices, Teams offloads audio processing to the HW devices. We should not be doing anything which would make HW mics more sensitive than any other meeting service.
EddScriven we are working on enabling camera selection, for multi camera systems, on MTR during Teams meetings. We are not looking to enable audio changes during calls / meetings as changing audio on a room systems should generally be very rare. In Teams desktop / PC, you can change / select devices during meetings.
Christophe Humbert we will leave XML config files support in MTR for now, however MTR can also be fully configured now from the Teams Admin Center, without need for XML.
Matt_NComm auto fit to screen for room systems is being worked on in Q3 of this CY.
wheeqo and Ivar Engen 3x3 video will come to MTR a bit later, its being worked on now (its being tested in our early rings, will hopefully ship in Q3 of this CY). To the 7x7 question, adding more video to Teams meetings is something we said we would also be working on and deliver later this year.
blouwagie I'm unclear on your question. Are you sharing a PC screen which has the Teams window on it? Have you tried just sharing a window instead of the full screen? Meeting participants should then only see the contents of that one window.
Ryan_Wang yes we are actively working on enabling MIcrosoft Whiteboard sharing to be started on MTR. We expect that to ship a bit later this CY.
Rory_Martin due to the COVID situation, both Cisco and especially Zoom (due to their well publicized security "time out") have had to delay their support for Direct Guest Join. As such, we expect to go into TAP with MTR joining WebEx meetings shortly, then into TAP for Zoom meetings in July, and hopefully GA by end of Q3 of this CY.