I really enjoyed the first five-ten hours but was pretty disappointed after that. Once you've screwed around in the open world for a few hours, the game really doesn't throw many new ideas at you. The last like 5 missions that are all linear were really boring and too many of the boss fights were bullet sponges.
It felt like if they came up with one or two more grapple-hook level tools, then polished a few more things, didn't repeat the same three environments the whole game, it would have been something really special. As it stands, it really falls short of what I thought it was trying to be. It's hard to finish the game and not feel like they were just trying to reach a minimal viable product.
First outdoor bridge, jump off to the left immediately outside the door onto the snow ledge. Jump down to the canyon floor from there. Ezpz.
Even if you miss that you can also hijack a banshee when you first get to the control room later on too, but that shit was in the strategy guide.