I have an OpenSpot3 on the way. It is basically every single thing I wanted, with a few exceptions.
One is callsign routing. The Trust system callsign routing is simply outdated in 2020. The OpenSpot's inability to do full ircddb callsign routing is the only reason I still run a Pi-Star. Making this work can be accomplished in firmware.
The second thing is not possible with a firmware update, so it is a suggestion for the OpenSpot4. Please, please, please include an LTE modem in the OpenSpot4. Then, nothing but a radio and an OpenSpot would be required for connecting.