Yeah, you can tell the controls were originally intended to be more sophisticated but ran out of time. Hose arm was originally going to be articulated and is structurally set up to do so, but didn't make the cut.
I will say though, that the Q/E torso rotation makes up for the mech's inability to turn on the spot, but is oft-missed due to only being on the game controls page. I didn't find time for a tutorial/control map, but have learned that even a quick F1 "this is how it controls" text dump is worth the 10 minutes dev time.
Hoping to make a few more improvements post-jam, so an invert toggle on the mouse will be one of those for sure.