.

Are the worms balanced to have their screams heard from over a dozen chunks away?
I'm still too far from the evolution to see them, but that would be quite the startling effect when one does appear nearby.

I find the idea of Nauvis becoming a screaming world of terror and despair as walls crumble to be amusing.

Real, its because their ranges are incredible, so the prime radius is even higher, I will take a look into it

Using this mode with K2 (not K2SO), at 100x science cost.

This is a perfect compliment to Krastorio. Krastorio has some very powerful weapons, it's nice to have some tougher enemies! It still isn't too hard, but I at least lose a turret or two once in a while, so I get to really play with advanced military options, without turning the game into tower defense.

It feels though that the 0.97 evolution is perhaps too high? With science multiplier 100x and pollution multiplier 1, I was only at 0.93 evolution when I opened the key advanced combat techs. I manually set evolution to 0.999 via console.

It might be interesting to make evolution non-linear? Start spawning very few colossals at 0.93, and then increase the ramp up significantly from 0.95?

maybe, I too think they are quite bunched up at the end. you playing with extra armored biters or explosive?

maybe Bigger Biter Bases mod as well could make things more interesting for you