No, you just haven't figured out how to use it yet
you press the armor ability button, right? ah, then i do know how to use it. still useless
Knowing how to activate it isn't the same as how to (properly) use it
i'm pretty sure that the left joystick does the exact same thing as thruster. perhaps its a little slower, but you can still run, shoot, crouch, grenade, jump, etc when you don't use the thruster. thruster is simply outclassed by the left control stick in almost every way.
"Captain Falcon wasn't confirmed for Brawl. Brawl was confirmed for Captain Falcon."