More than two grenades is a UI crime. And the original two grenades types worked so well together.

Frags used to blow a group of unshielded enemies to the four corners. Stickies: well we know what they do.

Halo 3 gave certain Brutes selectively non stick shields to justify having the extra Brute varieties but it was too obvious what Bungie was up to.

Some have argued that it adds strategy but the strategies weren't worth having:

• Don't use stickies if an enemy is close.
• Use Brute grenades against Chieftains

Frags have been neutered, probably due to MP player wingeing. And removing grenade pile detonations was a dark day. I had a break from playing the original game and forgot how dangerous they were. But you soon learn to watch out and you get more kills than deaths from them.

343 please separate campaign gameplay from MP. Give us more grenades and make them work like they did in the original game. Even bring back grenade pile detonations.