With all the amazing forge remakes on the rise, I think they should add a throwback playlist. They can a slayer mode with armor abilities turned off, so we can replicate the original play style or past halo games but with a halo 5 twist.
some of the amazing remakes I have seen are based off of,
Sandtrap
Cold Storage
The Cage
Zanzibar
Ghost Town
Guardian
Citadel
Turf
and so on…