I do wonder about that... working inside EASA (assuming they actually read the papers) must feel like doing the cutlery inventory on the Titanic, 1hr before it sinks.
But one must not underestimate the staying power of Brussels. With Germany in the centre, and Germany is doing OK, the EU is not going to fall apart. It's possible that the hangers-on like Spain, Italy, Ireland, Greece, etc (who obviously joined primarily for the handouts) will drop off but EASA will carry on for ever, IMHO.
What might happen is that some EASA initiatives might get moderated a bit in the final closed-doors EU sessions, because EASA/EU will need all the votes it can get. But I think this picture is too complicated to call; politicians who went to live and work in Brussels tend to be professional career gravy train riders (the UK ones who gave a hard time to Goudou being an evident exception) who will hang on regardless.
Many years ago I was a Director of a bigger business than I have now. The "chairman" (a rotarian, freemason, and into every social function going) was an old hand at this stuff. Every board meeting started off with a vote on the dividend. This lubricated the remainder of the meeting very nicely. Even yours truly, never worried about being a nuisance, went along with it. Take this, multiply it 10x, polish it for 50 years, and you have ......... the EU directorate.
It's not going to fold up that easily.