I noticed text objects, %, `, ctrl-i/o, and ctrl-r missing from my most common set of edit commands. That's actually pretty good since t/f are implemented and you can fake a lot of text objects with those. Also, the underlying ace undo/redo keys do work so you can redo, just not conveniently. It's one of the better stabs at a vim mode I've tried.

One bug I noticed: after a f/t motion you have to hit u twice to undo.