The reason why I wanted old maps in Halo5 is cause all of them are bad (well collosseum is fine).
I would be very pleased with good maps no matter what it takes. I don't know who created the multiplayer maps in the first Halos but he should come back or help 343i out.
More symmetric maps and less "details" to get stuck on while walking.
I really like Plazas design though
I don't think any of the games have had a single map designer. All of the maps are made by different developers and tweaked and polished by still others. Lots of hands go in to a finalized map (well most of them any way). There are a couple of examples (Lockout for one) that only had one or two main developers.
For more detail.......Just for information's sake , One guy , generally , will come up with a general map design or concept (think story board) , after initial development it is handed off to another person or team for general aesthetic design , given to yet another individual or team for smoothing paths and spawn design , and maybe still yet another person or team for final polish , bug squashing , and final weapon placement ; and all of this is happening while every iteration is being play tested repeatedly for viability.
A map generally goes through a long process before being introduced to the actual player base.