Oh man, this drives me nuts to no end. I'd gladly pay the extra ticket price for an IMAX showing if I didn't have to get a headache 15 minutes in.

I would actually recommend against it. I saw it in 2D IMAX, and there was enough shaky-cam that the giant screen just felt disorienting and a bit nauseating. I don't think Rogue One is well-suited to that kind of environment.

Out of curiosity, did you end up watching 3D IMAX? There is a single IMAX cinema in my city (so I cannot do a comparison), and Rogue One was awful in it. Blurry, dark, slightly out of focus. I wonder whether this is a flaw in all 3D IMAX showings, or maybe this particular cinema had some technical problem?

My experience was that 3D IMAX is way worse than regular 3D (which I'd also rather not watch).

The only passable 3D experience I've ever had was in a 3D Laser IMAX. The brightness was leaps and bounds better than any other 3D screen I've seen, and it wasn't constantly distracting like most are. The laser imax experience blew away any other 3D movie on a regular screen I've ever seen and it wasn't remotely close.

That said I'd still prefer 2D.

At my local theater, the IMAX movies I've seen have all been incredibly bright and sharp, both 3D and 2D. I don't think it's something inherent to the format.