Sentinel was given force camouflage back in beta because sentinel had almost no chance of beating a sniper.
They also were given the auto-crit aoe attack back in beta coz they had almost no chance of beating a whole freaking group, and a 4 sec god mode coz they had almost no chance of beathing the whole freaking group. So we get a smashing-monkey in process that can be invisible and invincible. And we than called it 'a balance'.
I'm waiting when the Hammer of Nerf will come online, coz there is some serious s.... to hammer down.