There's no way to be sure if people have been using "path" in an actual game. I'm hoping that FOD is on the lookout for any hackers trying to exploit the games.
If you encounter anyone who is absolutely outshooting you, just snooker him. Most of the games that I win are times in which I have to comeback using my defensive snookers even when I face such great shooters. On the other hand, some of the games that I lose are times in which I failed to hit a snooker successfully. Hit and hope shooters get the best of me as well. :(
Also, even if someone had "path" on in a game it doesn't make them invincible. That exploit doesn't enhance a player's ability to control the soft touch of a shot and therefore ultimately doesn't play a huge factor in positioning as well. But it is a big advantage without question and FOD really needs to take this topic seriously.