I'm a little disappointed by the Storm Pillar nerf. Sure, if you've got a Slide 4 power and hit the same guy 4 times using a single attack, yeah, kind of lame.
At the same time, that seems like it's kind of the point of having so many push/pull/slide techniques -- to force your enemies into locations that they really don't want to be in. As long as you leave it to once per character's turn, I don't see a problem. If the Rogue, Fighter, and Barbarian all want to wail on a bad guy and bounce him around next to the pillar, well... he should be roughed up that much more.
Yeah, it's basically pointless now.