Why laugh at the old dialog? It is still being called up in the instrument browser. Replace that, too.
By the way, I got confused with the new dialog in one respect:
Input says "Omni", I thought, no, I want it to record on Channel 1.
So I opened the dropdown and saw:
All inputs,
Session Drummer 1,
EZdrummer 1,
Virtual Controller.
I messed around a bit and realized I had no idea what these things mean, so let's rather put it back the way it was.
So how do I go back to Omni?
I tried All Inputes - MIDI Omni - nope.
Session Drummer 1 - MIDI Omni - also not.
Tried the lot, none showed just Omni, like originally.
So I thought, heck. OK; just select "None" for now, then delete the track and start again.
And HEY PRESTO! It displayed "Omni"!
So if you want Omni, select None...?!?
Edit: Incidentally, the old dialog does have a help button. Good for beginners.