I want a new map of high quality.
I don’t want to play on a map with bad graphics.
A lot of forge maps are great imo, they may be visually ugly for the most part but it doesn’t matter if a map looks bad if it plays well.
Developer made maps are out of scope for Halo 5 work now, any additional maps added into playlists would have to be Forge made. There are some great Forge amps out there though, as seen from the contenders for the HCS playlist
Forgeing is fun though, if you search around you will see some cool maps.