Hey Lucid, sent you an email!
@Udo - My drivers were out of date by about 6 months! Oops :P I went ahead and updated, but I didn't get really any improvement. Undo/Redoing takes about 3+ seconds also, which seems to be the slowest action I experience. It can be frustrating when you do the wrong action due to low frame-rate, and it takes even longer to undo it heh
Spriter is a great animation solution in progress though - anyone looking at this thread, please don't be deterred! I look forward to seeing all the improvements and additions coming in the future :]