I agree and it should be a setting under the filament profiles since each filament can have a different pressure advance or linear advance setting depending on which firmware someone is using. Having to change the startup script each time to set it is a nuisance.
Any headway with this? Different filaments tend to have different pressure/linear advance settings to just setting it in the startup Gcode script is a bit of a nuisance. There should be some line item available on the filaments where you can input some gcode, this way it will be saved under the filament and not for the overall printer.