Re: Actually rotate mixtape maps
I feel like out of all the re-purposed Arena maps, Habitat is by far the best one. Overflow was pretty good, but perhaps favored the long sightlines a bit too much. Party Crasher and Phase Runner, crap IMO. Habitat has lots of cover for rotation and allows for a wide variety of viable playstyles and opportunities for play-making.
I'm not sure that I've been super enthused about any of the BR POI maps are were repurposed for mixtape. I guess Skulltown is pretty good, as was Fragment until the entire player base decided to only play inside the train station.
Arena saw quite a few maps introduced throughout its life, despite questions about its popularity. Mixtape (particularly Gun Run and TDM) deserves maps that are made for it.