As an amateur photographer consciously aware of what conditions are necessary for lens flare to actually occur, I found it annoying and childish.
My feelings, too; it felt to me more like someone who didn't know what they were doing, not to mention that it washed out so much of the onscreen detail. For me, it doesn't improve the action or the emotion to wash out the frame, especially with the frenetic camera movements. It's like Will Farrell was the cinematographer - "Okay, I need to have all the lights pointing at me and then I'm gonna crouch and run around a lot and point the camera at you all, mmkay? Good! Is anybody hungry? God, I love my job!" Why should the future look like an acid trip from the '60s, esp. when they keep telling us, "It's not the '60s any more and this isn't your father's Star Trek." Well, yeah, if he was stoned, it is.