Pretty much. The whole primer/detonator system is based off of Dragon Age and Mass Effect anyway.
Yes. It wasn't too terrible in open spaces, but trying to do sharp turns all the time in more enclosed areas wasn't happening. Underwater was even worse and I had just drag the mouse as slow as possible, orient the camera and then try to keep it centered. I had a controller plugged in as well, so I used that sometimes too for the water, but the gunplay on PC with a controller was awful. Not sure how it might differ on the consoles though.