This would be a great idea . Like a game type where there rounds and the attacking get a scarab and the defending team has to destroy its legs and blow it up to win the Round.
Maybe they could find away for this to work like making each round 10mins with last 3mins a boost for the defenders if its too over whelming.
This is just a thought. Maybe already been thought of .
Also should of put hunters gun and shield combo.
As for duels they could of worked in halo 4.
For example you have fire power which let’s you use two primary weapons .
Could of made a package that let’s you use two secondaries. So plasma and pistol or needler and pistol. This would come up as a duel weapon.