There are a lot of Reach, Halo 4, and H2A maps in the Maps section - obviously I don't advocate deleting them, but maps should really be tied to a particular game, and lists should be sorted by games as well. When you're looking for the "top" rated Halo 5 maps, you shouldn't have to eliminate maps from Reach onward in your search results by carefully scrutinizing each thumbnail to assemble a list. This makes the site a lot unfriendlier for newer users as well, who may be first-timers here and unaware that they can't download certain maps to Halo 5. Hopefully this is being worked on.
I'm glad you posted this - Just yesterday I was looking for good maps for this weekends custom event and I saw one that looked great and typed up something telling the author that i chose their map for the event... except it wasnt a halo 5 map lol Awesome