G82 Allow to move multiple E axis in absolute mode

[nyaru]

I am building a support system for motion art production using Duet. The motorized art may use 10 or more motors.
I am currently using multiple E-axes and disappointed that the M82 does not support multiple axis movement.

https://github.com/Duet3D/RepRapFirmware/blob/3.5-dev/src/GCodes/GCodes.cpp#L1815

I have solved this problem with CAM to convert relative move, but I would like to use absolute coordinate movement of multiple E-axes if possible.

Is there any reasons to prohibit multiple E-axis moves in absolute coordinates?
If there is another way to move multiple E-axes in absolute coordinates, please let me know.

Thanks,