I don't much care about things like crew fired weapons and those sort of changes that improve the group dynamic as that doesn't really hurt anyone (I think "complex surgery" would be kinda stupid though), but the idea of a "sanity/need for social contact" mechanic is absolutely awful. The type of person that is a lone wolf isn't the type of people that need social contact to maintain a healthy mindset, and the type of people that lone-wolf don't want to be forced into group dynamics... so what is gained? The answer is nothing, at best you get people who grudgingly do the minimum required to satisfy the requirement, and the more likely scenario is that you just lose players who aren't going to be forced into playing the game in a way they don't want to. The idea that lone wolf people wouldn't do fine in an apocalypses is a bit absurd to. They're the most suited to both handling the mental challenges and managing to avoid trouble. I know several folks who do just fine who have been living out in the sticks for decades.
