I hate to be a downer, but honestly I read "core improvements" for what happens post 2.4 as "time to put ED to pasture and just chip in with the occasional maintenance and QOL improvement."
That's certainly possible. The slowing pace of development would seem to indicate that, but I still have hope that much of the dev team is just working ahead on stuff behind the scenes that we have absolutely no idea about. I'm probably just being stupid though. Time will tell, and all we can do is wait for Frontier to possibly enlighten us someday.