I know the blocking stuff is actively being worked on as we aren't happy with it yet. However, that is an issue where it would be literally impossible for every user to be happy with whatever end state it results in. That is an area where the different software platforms can offer people different experiences so that they can seek out the type of experience they are looking for.

Almost everything else you listed here can be turned on/off by an admin. I didn't know about the 8-character username thing, probably worth revisiting that. The downvotes being disabled with low attitude is one I don't see being removed, but could be an admin-set threshold (or disabled) in a future version. In fact, I suspect that the formula was written this way to make the threshold more well bounded instead of a simple up - down calculation.