What is the nerf that ghosts need?

Snipe is still insane in TvZ. Ghosts counter spellcasters that don't really have a counter to ghosts, and then they also counter every other unit, especially the lategame ones. Once you get to the lategame, there's never a reason to not mass ghosts. The game says that roaches are the counter to ghosts, but has anyone ever made a roach after the 9 minute mark?