There are already mods that do new turrets. This mod shouldn't be about turrets, but just about biters. Heaven forbid that we end up with yet another set of weapon systems because we wanted to have a harder time with biters.
Ditto with the early rocket turret. Please move it to a different mod that is marked as optional. If you are making a set of specific weapons for use with this mod, grouping them into a bundle is fine. But mods should be "modular" :).