While assaulting an alien base where you have to destroy some machines I found it really annoying that shots fly all over the place when shooting at them. Those machines are bigger than my drop ship, a blind person could shoot in their vague direction and not miss. I actually found it more effective to target the ground near them than it is to target the machines (they look like power generators)
This effect is exaggerated because when you miss a target the shots will land in some random square around the object but seeing as the generator is several tiles big the shots fly off at 90 degree angles if you shoot point blank.
You would assume the best soldiers in the world would be able to hit stationary objects.