I feel that most Halo 5 maps are designed with one sort of game type in mind, which would either be Slayer, Strongholds, or CTF (since those were the three initial game types). I have a lot of fun with the maps when they are paired with their proper game type. For example:
Slayer:
• Overgrowth*
• Riptide*
• Molten* (have only been able to find it in the Slayer playlist)
• Regret*
CTF:
• Truth
• Coliseum
• Tyrant
• Torque
• Stasis*
• Fathom
Strongholds:
• The Rig
• Plaza
• Eden*
• Empire (can work very well with CTF, too)
Now of course some of the more objective oriented maps, like Plaza, mix well with Slayer, but they're at their best with their intended game type.
One thing that bothers me is map shape variety, they seem to be all around the same size and are only fitted to square or rectangle pallets. There are no interesting, uniquely shaped maps like Ascension or Guardian. Sure, there may be asymmetrically built maps like The Rig, but it fits very nicely on a square pallet. All of 5's maps seem very oriented for professional play, as well as the game types that launched with the game. This has always been my biggest gripe with multiplayer since day one, I don't want to always have to turn to Warzone for more social play. And speaking of Warzone, I think treating it as the new big team/social playlist has hurt the map design a lot. Now since large maps are reserved for Warzone, there is no longer a need to design any map to accommodate more than eight players at a time, which leads to maps like Zanzibar or High Grounds to have no place in Arena. Sad to see proper BTB and the variety of sized maps that came with it die because of Warzone.