I don't think it's that bad either, and I'll be getting it most likely, but..
I just looked and noticed that the suggested retail price for the 2D Extended Version is $35.99, and for the 3D Extended Version is $54.98. Given that all of the bonus material is the same on both sets, I think it's a little much to ask for an extra (almost) $20 just to include the extra disc with the 3D version of the film. If you go by what Amazon's currently offering, it's $19.96 for the 2D, $39.96 for the 3D, so it actually does work out to be an extra $20 exactly.
I personally think all 3D titles should cost the same as their 2D counterpart. There are a lot of functions and features on a Blu-ray disc that not everyone has the ability to access or chooses to access, but they charge the same price for the movie anyway. Until a couple months ago, I didn't have surround sound, much less lossless audio. But the studios charge the same for a movie whether it has lossy audio or lossless audio, and they charge the same whether the movie is in mono or stereo or surround sound. 3D is the only tech spec that we're charged extra for. But I accept that the ship has probably sailed on 3D versions being sold for the same price. But when you go to the movie theaters, they charge you $3-6 extra, depending on the theater. Most 3D Blu-rays sell for about $5 extra than the 2D version; some sell for closer to $10 more (Hello, Disney!). But $20 extra? That seems excessive to me.