Not sure how far you are but there are quite a few places with diverging paths and where the whole stage is kind of a maze and you can backtrack to solve puzzles. Some places you cannot explore and have to go back to later with powerup skills and weapons.

I dont have an issue with it being linear I think thats bullshit because its not an open world game and when there’s too much backtracking people complain about that. I mean shit, no one complained about uncharted being linear.
Also the sound when heard uncompressed in 5.1 or 7.1 surround is amazing as well. All they really need to do is patch the shit to smooth or stabilize the frame rate and this game would be officially THE SHIT. As of right now its on the way but not there because the framerate sometimes is kind of SHIT. LOL