Moving will be made to interrupt spellcasting at a point in time...

[darkstarpoet1]

explain the "need"

the "need" is dd's seem to think that's how a mage class should be played. that's like saying to cast any action as a dd you must be standing still all the time as well. they haven't completed the high level content as a mage, therefore, they don't see all the stuff it helps them do.