I thought 4E was brilliant in many ways. There were many things me and my players loved about it, but try as we might to be creative enough to break out of its combat that played like a board game, we just couldn't. The realization that we'd stopped seeing combat as a creative theater-of-the-mind, and almost entirely an exercise in trying to work every angle on push-pull-shift-knockdown-etc mechanics, kind of had us looking at ourselves in the mirror in horror at what we'd become.
Well, ok - a little melodramatic. Wasn't quite that bad. But ya; don't blame anybody for jumping back into it, especially if you dig the tactical strategy game aspect of the combat.