From the sounds of it though its only going to be while your standing there doing absolutely nothing. The new stance won't be visible during battle which made me lose interest.

"Poses will not change for five seconds after executing auto-attacks or actions such as weapon skills.
* To enjoy these idle poses, auto-sheathing of weapons must be disabled under Character "

So basically sit there and stare at a power ranger pose for a few seconds then move on, woo. <_<