It appears Bohemia actually is using this map on Project Argo which was released for free today. Project Argo is a 5v5 standalone, aside from Arma 3, that has its own game mode. One of them looked like capture the flag from this video:
https://incubator.bistudio.com/That would be sweet to use those flags as capture zone/points in Arma 3. This is something I've been actually looking into, have a flag in the zone that moves up or down and changes sides depending on which side captured it.
Here is Project Argo for anybody who wants to download it:'
https://store.bistudio.com/products/project-argoIt will be in your Steam Library folder as its own game so its not an addon nor mod...I am going to give it a try.
Hopefully some of the assets will hit Arma 3 in the next update DLC release they put in Project Argo...
Enjoy!!!
If you need any help Matt let me know I will be glad to help you with the Malden A3W conversion...