It sounds to me that the actual MT >< OT stance dancing will be fairly simple and be pre-HW warrior like. MT? Darkside + Grit. Switching to OT? turn off grit, darkside still on.

Dark arts however, sounds more and more like cleric stance instead of defiance on/off or sword/shield oath. Course since the actual application is different (harm and heal versus just juggling mana for drk), I still wonder just how much arts pedalling we will be doing.