Agreed on "points A and B" stuff, not only it often leads to visual glitches like shooting through walls and other obstacles, the downside of that system is the impossibility to reliably destroy enemy cover (except with free-aiming weapons like explosives), which was quite baffling, given that this feature existed even in the original game.
You can't argue that XCOM 2012 was still a great game, very polished and visually appealing, just not without its own flaws and somewhat lacking in strategic department.