I agree to most of that. Kinda saw the idea behind it at the start of playing the game.
Howerver, there's a easy fix. Remove the carrier's slow speed to normal and allow him to shoot as he would with the flag. I don't like the latter suggestion tough. I like that he can't shoot. It encourages Team-work which is something lacking a great deal in Halo4 G-Ts. But still allow him to throw the bomb. Remove the waypoint as well. He can though the bomb, so the waypoint is nest to useless anyway. Plus the point of arming a bomb is that no one knows you're doing it til it being armed. Removing the waypoint gives it a CTF sense. In CTF, players play defense cause they can't see the other players coming outside of the radar and Promethean Vision. The mystery of not knowing where the bomber was is what made it so much fun. You could plant it and accidentally stop plant before it happened.

I say return it.

It's way better then Extraction and Dominion. Which are just new version of Territories.