1. It is impossible long time to upload project to HMI. I see no problem from hardware side to add extra bauds: 230400, 460800, 921600.
2. In the Nextion Editor Debugger it'll very comfortable to add ability to send commands to the simulated device via serial port.
In this case it'll be possible to perform rapid test of the project via real COM from external uC, or via virtual COM from other programms e.g. Proteus.
I am now reviewing all of the Feature Requests, this will take some time, patience please.
Additional support for higher Baud rates - carried forward
Virtual MCU is a bit more problematic, but is already represented