@gdon_2003 It could be as simple as changing the separate Start and Pause buttons to more of a Pause/Play setup since you only have one state active at a time anyway. Then rename Stop to something more descriptive about ending/exiting the current job.
In the interest of KISS - I use a Kreg router switch, which may as well come with the machine! It doesn’t have the benefit of staying off after a mains power cycle, but with a BitRunner that hasn’t been a concern of mine. If you’re on the fence about implementing an estop for some reason, this is a great solution that is designed for routers.
Raising feed hold to a properly documented feature seems like a great idea, though some easily accessible guides to proper workflow should be made. Read: I shouldn’t have to come to the forum to find them, make this stuff a single flow diagram linked from the software.