This begs the next thought - you could enhance/redesign Octane's Gauntlet, resize it, move the pads/platforms further apart, add more cover/boxes etc. It would make for a very decent map IMO. And, you could add a second PoI? Maybe some cool underground cave system under the surrounding desert, that would be really cool.
Also, the Mirage Voyage map (sorry I don't know the exact name) feels like a 1 POI map to me. Yes, the ring can go to that complex to the south, but in my experience thus far, 9/10 games are decided around the voyage ship. I personally think that map is too small, or the ring doesn't pull enough south on the first ring.
You could do all of these things! However, you couldn't do those things and still have it be a "BR location"--the big win for us there is that we don't need to make a new map and can literally load the BR map. That's why you're not seeing any changes at all between Artillery in KC and Artillery the Arenas map--same for Thermal and Gardens in the next few weeks.
Now we could copy-pasta it into a custom map and develop it further that way, but at that point we might as well build a map for Arenas from scratch. If you've played a bunch of Arenas already, you will probably have found that Phaserunner and Party Crasher play a lot better than Artillery--that is because they were built from the ground up for Arenas gameplay, and we've learned even more since then so our next Arenas maps are going to be even better (IMO).
As for Party Crasher, having played on this map for nearly 6 months now, trust me when I say that people will eventually come to understand the power of the POI we used to call Construction (back when it was actually an in-construction building; not sure what we call it now). Particularly when the air drop and the circle are there, taking and holding that building with Wattson/Caustic/Rampart/Gibby or someone like that is immensely powerful. Eventually the ring will bring the Voyage players down to you, forcing them to approach through no man's land.