Thanks for this! It is an interesting read as I find myself in a similar spot (basically FI, waiting for a year or so for "life" dust to settle before leaving / downsizing the job).
I don't have an official date yet, so maybe this will change, but I've been feeling since we hit our number that work has gotten easier. Specifically, leaving things unfinished at 5 and just walking away has gotten easier, and that's something I've struggled with in the past -- not that I would stay and do all the things, but that they would gnaw at me afterwards. Some of it is probably just getting older and realizing more and more that things are never finished, but I do think part of it is a feeling of "oh well, if I get fired that's fine" (which is totally unrealistic, as I'm a good performer with zero worries about getting fired). It has been interesting to note this shift, though.
And I really like the advice about reaching out to folks on the way out. As an introvert, that definitely wouldn't have occurred to me.