Does this mod remove biter and spitter spawners as they are generated? I've been doing some testing (originally with RSO to determine how much richer ore veins become far from spawn), and it seems like with this mod enabled there are way fewer spawners than there are without, with about 1-4 spawners per 'nest'. Is this to compensate for the biter expansion abilities in some way? Also, since the worms are left untouched, once you go a decent distance away from spawn, there are huge fields of worms all over the place with only a few spawners next to them, which is pretty silly.

Also been noticing this. Seems to not happen in vanilla

Here's a few examples of what I mean.
When I initially use a console command to generate an area around spawn, this is how it looks: http://images.akamai.steamusercontent.com/ugc/279604648855767004/B0FF8DF14FDA2C6CA853757CCAC595CB16CBE158/
Once I run the command again to refresh the map, 70% of the spawners disappear: http://images.akamai.steamusercontent.com/ugc/279604648855771137/F7AD91FD79002981FBE210221ABB033378C9B435/

Also, this is what I mean about ridiculously huge worm fields. This isn't even 4000 blocks from spawn: http://images.akamai.steamusercontent.com/ugc/279604648855774092/2E7A8BD8E8C49A414540BF527384AF4E355C2D83/

Yeah I have noticed this too.

It only spawn 1-4 biter spawns, it completely ignores the map-gen settings. So you can't get a huge pre generated +100 biter bases