Mindanao isn't the problem. Mindanao is the prettiest and most complex terrain we have in Aces High. The problem is that we get stuck in Mindanao and can't reset it while the others reset quickly, especially if there is a numbers imbalance.
The problem is that we don't have a terrain rotation policy that guarantees we don't get stuck in one terrain.
While I understand the attractiveness of the CT to many, personally, I would rather have toothpicks shoved under my fingernails than face a steady diet of the CT. I like flying to a target, never knowing if I'm going to encounter 262s or a swarm of La7s or N1KJ2s. In the CT, if I'm LW, yep, I'm going to see spits and typhoons. If I am allied, 109s and 190s.
Besides, if we don't have swarms of La7s, doras and N1KJ2s, channel 1 won't have the same entertainment value.

curly