Quote from the 'Legion Class and Systems Community Amphitheater Discussion' at Blizzcon 2015:
I know it is early, and can of course change before LEGION etc. etc.The new Storm, Earth, and Fire is being simplified and made more intuitive. It will be a simple toggle, somewhat similar to Blade Flurry.
You turn it on and split into three, turn it off and you recombine into one. They won't attack the same target as you, but they will find something nearby to attack. You do lose the customizability of assigning targets, but it will do something useful at all times.
Just want to hear what all you other Windwalkers think about this change.
Personally I would like it to stay the way it is now... but maybe it is possible to make a glyph to make it work like it used to, so win-win?