Soulsand valley mobs spawnrate

That new biome will be feared like pest if nothing is done. It features the worst mobs combo possible, two spamming projectile: Ghast and Skeleton. The spawnrate is horrid, I can just enter the biome and already have 2 skeletons and 1 ghast spawning each 5 seconds. It's suicide. The solution I have is just avoiding biome or digging galleries under ground. The spawnrate should be very diminished. Not everyone enter nether in full diam, some with full iron. And fireball + arrows kill you very fast.