I'll get over everything (i've complained about so far) except how collections work and how merge doubles is gone. If the devs don't sort it out by release, I'll solve it with addons.
Just engaging in the time honored tradition of hand wringing.
"Merge doubles" is renamed "Merge vertices" (alt-m) > "by distance"... in the "Vertex" menu.
(Though the change makes sense to me, I wish they kept an alias so people can still find it.)
The remove doubles operator is now called "Merge by Distance". You can find it in Mesh > Clean Up. That's actually the first thing I added to the new quick favorites menu which you can access with the q key.
