My experience as a software dev on large/complex projects is you’re focused on just one aspect of the program. msfs definitely qualifies as large and complex so I’m sure devs are mainly focused on their areas. After spending 40+ hours on that I’d personally find it more difficult to want to spend my recreation time in the sim.
I keep hoping they’ll fill that “ATC dev” spot so we we’ll see improvements in that area. I think that would be a fun area to work on as well.