After holding my breath and updating (and getting the relatively radical Studio changes), I can't seem to change the emulator type/parameters for Android. No matter what I do, I get an HVGA resolution emulator with (seemingly) a random API level.
Tried setting the default emulator in Preferences. Nope. Tried setting the emulator in Run Configuration. Nope. Tried deleting all AVDs and starting from scratch. Nope.
I've been spending the whole damned afternoon doing the typical Post-Update Titanium Shuffle just trying to get things back remotely near working again, but this one is a particular irritation.