What people need to remember about the resolution and performance, and some people need to stop denying, is that this is a remake and not a remaster. If you were expecting 1080p 60 fps, you were lying to yourself. The game is running on a new engine, with new assets, new special effects, and rebuilt in a far more advenced state than the original. This is why despite lower resolutions, the game will still look far better than a 1080p remaster of the original code.
Having said that, it is still disappointing to see it that low. I definitely expected a bit higher in the resolution department.