as far as i heard its not instant cancel its like 11 where you wait till the spell is done casting. in Eqoa you could move while casting but your movement speed was reduced to walking. which i think if they are gonna do the spell thing it should be that. and IMO spell interruption if anything should only be at the low levels for beginning mage lore wise sure and amateur mage would have to sit there and concentrate but a master no they can multitask and even cast magic without even doing the incantation. moving around in this game is fun it makes the fights interesting and fast paced its fine right now if your moving you dont get much mp back as standing there thats a good trade off.