Hi! No worries on the long comment :D
To answer your questions I think there will be endings you like and ones you don't like.
Let me go into a bit more detail below for you (beware minor spoilers??)
The mutations have special endings if any of the traits are maxed out, but we are trying to balance this because we want the game to be fun, and not hard. It's also set up so that no 1 trait is always the "right" or "kind" choice. Sometimes you'll want to pick the selfish option, and sometimes you'll want to pick the selfless and so on. It won't be especially hard to avoid maxing them out if you want to avoid those endings, though the endings with it are very fun I think.
I know it's very opposing to what most games do where you're rewarded for maxing things out, so if that's something that really doesn't appeal to you I totally understand!
We do have an extensive (but with spoilers!) list of content warnings if you want to check them out. It's on our website so that we can update as needed.