Pretty sure they mentioned on one of the 343 Podcasts that the Teleport was once the successor to Evade which ended up being the Thruster Pack... which makes me wonder why the hell it's still in the game's code... with... fully rendered effects. As for the Hacker ability, I'd never heard of it before.
But Jesus, seeing the Teleport have the ability to vertically shoot a Spartan places makes me really with the TP had that function.