Your modlist regarding biters sounds very similar to mine (except I wasn't playing on marathon mode with 5x tech cost), maybe I should indeed install Loss Prevention to allow me more leeway with active pollution management. At the moment, even if I do contain my pollution using the active management ...
It seems biter de-evolution is too strong right now. ...
It is funny you say that considering that the prevailing opinion is that NVDay makes the game far too hard, and alien attacks and evolution ramp up far faster than the player can possibly compensate for. Indeed, I have seen that happen ...
I'm surprised this mod hasn't received more feedback in this thread, although admittedly the thread would be easier to find if the mod's homepage was set to this thread.
I've played with Nauvisday on two playthroughs now in a modpack with notably Angel's and Bob's mods, Rampant AI and Natural ...