I would like to see this return, but I would also like to see it more frequently done than in Halo 4. I love the idea of people having their maps playable by everyone. It adds a good reward to putting hard work into Forge mode.
Imagine if per week they added the most popular Forge map to the playlists :3
I loved custom-maps made by the players in Forge on Reach. Mt Lam Lam was one of my favourites.