Is the biter change going to be put straight in the 0.17 stable branch, or will it stay in experimentals for a while? As your own gifs demonstrate it's given the biters a significant buff and IMHO such a balance change shouldn't be made to the stable branch.
We will release it as experimental, but we don't anticipate taking a long time to mark the release as stable.
Do non-colliding biters increase performance at all? It seems like it would, but I didn't see anything in the FFF mention this at all.
Yes, it increases performance.
Does that mean it's possible to spawn >1 spitter on 1 tile to create some sort of spitter explosion?
Something like that: https://gfycat.com/RichForthrightHyena
devtrackers.gg