Clamber is the most useless thing. It takes away your ability to shoot at enemies for reasons I can't discern. It makes jumping into this weird win/lose proposition when it shouldn't be.
The thing I hate is that, as you mention, you HAVE to clamber for many standard jumps, so you have to put yourself at a disadvantage just to move naturally. Since they'll probably keep it, They should either stop designing to require clamber OR at least allow you to shoot while vs clambering