1. The ability to see the friendly name layered over the connection screen when fast switching between multiple open RDP sessions, in full screen. This will greatly increase the productivity of IT pros who switch many times between many sessions per hour! It will also greatly reduce the risk and frustration of switching to the wrong session.
2. Enable cloud/OneDrive sync of RDP connection documents as a preference in the MSTSC and macOS clients.
3. When right-clicking on an RDP session list item, in the macOS version, add "Reconnect" to the context menu, alongside "Open" and "Disconnect". This is also a major boon to productivity when RDP sessions time out or disconnect.