[soulofmischief]

doesn't provide much in terms of discoverability

Space or Shift-Space or whatever the new 2.8 default shortcut is opens up an action menu with every possible action available to you and a search bar to explore them.

Actually, with this feature Blender surpasses most other creative suites in terms of discoverability. Perhaps what you are really looking for is a tutorial? They have those, too.

[Crinus]

Yeah, back when 2.5 was new i was annoyed that space changed from showing the popup menu in 3D view to showing that action search list but this annoyance quickly went away when i realized how faster it was to find new stuff with it.

[soulofmischief]

Shift+A makes sense for the new default 3D menu though, it's Shift+A(dd)

[Crinus]

IIRC the pre-2.5 menu wasn't just for adding stuff (though it was its most common use).