I can attest to Harlequin not casting anything with any combo of attachments or lack there of.

The AI is vastly improved compared to what it was. My only issue is that there is now no way to prioritize cure spells since they changed the nature of the attachment. I grabbed a bunch of dolls in sky and let them beat me down to red HP and my auto decided I needed haste instead of a cure with nothing but a light maneuver up.

Over all, though, I'm very pleased with the changes.