I'd say that 50% of my rockets always veer off far to the side. 90% hit chance my arse. Just had one miss after a group of Mutons WARPED IN OUT OF NOWHERE. They literally appeared in the middle of a heated battle, where I clearly had sight.
I'm really starting to dislike the dice rolls in this game because the percentages seem to be straight up lying to you in numerous cases.
I've had 4 85% shots miss IN A ROW. The chances of that actually happening are ridiculously low. I've recently missed a 95% and a 98% and had a friend miss a 100% shot.
The game still isn't that hard if you're playing cautiously but man, I really don't like the numbers game that's going on behind the scenes.