The lava is a weapon
On most maps your only variables are the enemy team and the terrain. Here you have a hazard that can work for or against you depending on who is paying attention. It punishes bad positioning even when nobody is shooting at you, and it cuts both ways: you can use it offensively by pushing or baiting enemies into it, turning a bad trade into a free kill. The team that treats the lava as a tool wins more engagements here than the team with better aim alone.
The flow is alive, too. During a battle, it advances toward the Airport, so the ground you trusted early on can turn against you later. It is a hazard you learn to read, then learn to use.

