1.I am attracted to the addition of elements of survival within the framework of Space Exploration.
In Space Exploration there is an individual life support system. Accordingly, the life support system, at the space stage, will be used instead of the "Oxigen" mod.
At the expense of planets with a suitable or unusable atmosphere, there are two options:
a.Stupidly limited to Navius
b.Try to cooperate with Earendel and create a separate parameter when generating planets - suitable / unsuitable atmosphere - if there is none, or add integration with "Oxigen" so that he can recognize this parameter.
2.You got it right. The more variety in the game, the more interesting. That's why so many mods are created.
Theoretically: food can be obtained in battle from biters, fish, process trees, create agricultural farms, fish farms, pens for breeding biters for food .... Food can be fried, boiled, canned ... And so on. You can complicate the system of breeding and cooking, that is, in principle, fantasies, there is where to roam.
3.I don't want to impose anything on you. I just offered you some ideas and examples. The main thing is that it would be interesting for you personally. And in what form to implement it - I think - you know better than me ... Unfortunately, apart from ideas, I, for my part, can offer nothing.
4.I don't see the point in creating a separate victory scenario. It is better to supplement existing scenarios, for example, the same Space Exploration, with new gameplay elements.
5.The best option would be to create a unified survival concept that would combine the best solutions that have already been applied in existing mods, and could be supplemented in the future with new solutions...
Creating a single supermod will be too difficult to develop...
It's easier to create an add-on mod based on the Xtreme Fishing principle - which would combine existing mods,
adding a new concept to them.
So that fish and its derivatives not only heal, but also satisfy hunger. At the same time, in terms of treatment, they would be less effective than the Krastorio 2 first-aid kits.
It is clear that some mods are of little use for combining. But you don't have to do everything at once. The main thing is to make a base and integrate into it those mods that are easier to work with. And then it will be clear what to do next.
6.You can try to fork Survorio https://mods.factorio.com/mod/survorio and modify it for integration with other mods.
7.A high level of complexity is not needed - new gameplay elements will simply be added. Resources can be made easily available, but required, requiring the player to deviate from building a base to replenish the stock of needed items in the inventory.
8.I'm all for it.
9.I don't mind chatting on other platforms. But in terms of code, unfortunately, I'm of little use.