Dunes is the best brawling map.
The high ceiling and dune banks provide enough space to use various engagement tactics.
you can easily hide by flying close to the ground, there are plenty of moving clouds to use for cover aswell as structures that provide the smallest amount of cover needed to stay alive.
It is only because teams insist on flying around in circles, staying in corners like skill-less rookies that dunes is considered bad.
Firnfeld is ten times worse than dunes in sniping, the cover in firnfeld are based on survival, not on engaging. This means that a team that attacks have to use high ceiling cover where they will be in gun arcs imidiately. In dunes however you can engage from low points and force your enemy to go lower if they want to hit you.
It´s funny how in Thralls we were always thrilled to see dunes in our map picks. Just like some teams are thrilled to see duel at dawn in their picks, or even paritan. you know those guys who like to ram and use goldfishes a lot
the only map I would say should be removed for the time being is paritan due to its consistent slowmo bug that keeps hitting in every time that map is played.
neither dunes or duel provides any gamebreaking bugs that makes it impossible to play proper.