And he's doing it all pretty mute. Even comic book Perceptor talked a lot, not silent assassin.

On one hand though I like the idea that the "scope" aspect of Perceptor allows him to be a sharpshooter... but you could have put Sureshot in that role too and nothing would change. It would have been much cooler if Perceptor turned into his seldom seen cannon/tank mode instead of pulling out big guns.