I agree that imported Gcode would work fine, but I'm not concerned with imported Gcode. If I'm importing Gcode from Fusion360, the commands are already there (plus I'd probably go with UGCS for this scenario). There are 2 scenarios where this would be needed:
1) There are some simple jobs that I'll import an SVG into Easel, lay it out, set the carve depth and then export the Gcode. Right now, Easel will add M3/M5 commands for spindle control but I have to manually go in and add M8/M9 commands. Is it a minor inconvenience? Yes, but with the Xcontroller now front and center with FLOOD and MIST outputs on the back panel, you'd think support for this is either a) in the works or b) should have been already added. My primary setup is a Raspberry Pi using UGCS to send out Gcode but I like the simplicity of Easel for quick carves instead of getting Fusion360 involved and I can connect my laptop directly and use Easel to control a carve. Even if I'm not using UGCS, I'd need to export the Gcode, adds the commands, and then reimport it into Easel which also means I can't make small adjustments on the fly. Any small adjustment would mean going to the original project, changing the design, re-exporting the code, re-adding the commands, re-importing the Gcode. It can get a bit cumbersome.
2) Make a design in Easel/import SVG, lay it out, setup the parameters then use Easel itself to do the carve. When you click the Carve button, it goes through Homing (if needed), thickness confirmation, probing/home position confirmation, if its setup, it'll even turn on the spindle. But then there is no option to turn on a Vac that is connected to FLOOD/MIST before hitting "Carve" and starting the carve. You'd basically be forced to go into scenario #1 involving export, adding of commands, and import of code.
Is it all minor? Yes. But, with the Xcontroller taking center stage and FLOOD/MIST readily available on the back panel, I personally think it'd be a smart thing to add. It could just simply be a checkbox in Advanced machine setup saying "Enable M8 output" and "Enable M7 output" which would then just add those commands or give a box during the carve setup screen saying "Turn on M8" and/or "Turn on M7".