First off nice work! Second, I personally dont like the Keyhole entrances on the ramps it gives it a funneled feeling and maybe lower the heights of the gravity lifts felt like I was in the air way too long.
Funnily enough, I'm also remaking this with the Sangheili pieces. It's set in a canyon in a storm outdoors.
You think the keyholes are too narrow, or you just don't like the fact that they close at the top? Also, I purposefully made the lifts take a while in order to make the lifter vulnerable. To counteract this, the edge is clamberable.