tldr; Is this really something that needs to be changed? What is the actual problem here?
Be wary of changing things without a good reason if there's a risk it could make things more confusing.
"Edit Playlist" and "Edit Auto-Playlist" behave inconsistently.
A Playlist and an Auto-Playlist aren't the same thing, so it's okay that these commands behave differently.
The first opens the playlist in a sidebar, and the second opens the settings, as they both used to do. I would like for them both to behave as they used to.
You've literally said both commands behave as they used to do, but you want them to behave as they used to.
I haven't noticed any recent changes around this and I've just tried 3.3.7165 which is about to have its first birthday. It worked the same then as it does now.
So what do you mean by "behave as they used to"?.
Maybe the current "Edit Playlist" could be called "Open Playlist" or "Add/Remove Tracks", something more descriptive of what it actually does?
Edit Playlist is already descriptive of what it actually does. "Open Playlist" sounds like it would start playing it, and "Add/Remove Tracks", while technically accurate, is really just another way of saying editing. The difference is that "edit" comes with decades of experience built in. People know what it means. For example, people don't say they're going to open a Word document to add and remove words. They edit it.
If we can't go back to the original behavior of Edit Playlist, then please at least rename "Edit Auto-Playlist" to match.
If anything must be changed it should be
Edit Auto-Playlist where you not actually editing the playlist, you're editing the rules that populate it. So maybe that could be
Edit Auto-Playlist Rules.
(Really it should be "Properties...", but MusicBee doesn't follow that standard elsewhere either)
As a side-note, one of the nice things about the current commands is that it's an easy way to tell a static playlist from an auto-playlist.
Bee excellent to each other...