You compared it, huh))) On Jebus Cross, whether you like it or not, you'll have to go.
I'll repeat once more - the probability of rolling 4 out of 7. Test generations showed that the main battles unfold on the second week on the main zone and secondary zones, with treasure zones as an alternative option. Besides, on the second week you won't really go into a treasure zone that much, and if there's a swamp there - it's a complete ignore. You could do it like this: in the 1st treasure zone, remove the possibility of stone and swamp spawning, in the 2nd - sand and snow. Then the probability of using pathfinding in a treasure zone will be 2 out of 5. Will that work?