Hi there, lets talk about the multiscreen management.
There is a real problem with that. When the master have 1 monitor, he connect to a "slave" who have 2 monitor : it's complicate to see screens because both monitor are merged.
I think a good solution is : offer the possibilty to switch "slave" screens. Like in teamviewer. We see the main screen by default and can switch to other screens. Or full display (merged screens).