It is very possible to take down a vaga, limit the space he can move in, use the flashlight, predict his movements. When in doubt go human, the extra hp and bash is one of the best counters. Also if you have a lace the vaga is next to useless, especially if you do what I just mentioned. No nerfs will even happen or ever be needed, on this server the speed and teleport is what makes it such a dangerous race. As Scrib said, learning your enemy is the first step to beating them.
"To attempt to have intercourse with a hornet's nest is a very bad idea," Siv During Livh, a psychologist and expert