That's a lot of ideas, would be good if you could next time reply to your own comment so they are all in one place to see easier.
Most of your ideas are really specific to each species and while I am okay with that as a concept we are only 5 people making a massive game. The scope needs to be far easier to accomplish. We will have nests and side activities. Each nest will be unique but they will all act the same way for the most part.
We will have a first person pov during player and mon acts, not sure about a camera option though.
Predators already hunt the player and attack if they spot you even during mating with another Mon. Some species are rarer than others, when we have the entire island made it will be a big ecosystem of monsters interacting with each other.
No taming or pulling them back to the camp. It's a photography focused game at the end of the day.
Good ideas though