I don't think anyone can take direct responsibility for the system as a whole.
Those of us on the liberal end bear some responsibility. We pressed for a lot of the legalism, at least to the degree that we kept asking for procedural safegaurds. We did so often because of the abuse and outright deceptiveness of previous generations of moderators. When you have mods outright lying, baiting members, and going after people for personal reasons, it's a problem. For those on the outside, one viable response is to press for rules and principles by which to hold those moderators responsible. We did that, and in many cases we got them. Add to this the shear number of people (primarily conservatives) pressing for rules restricting access to the subforums, stipulating what can and cannot be said, or who can and cannot use of this or that little icon, and you have people on both sides pressing for more rules. What you ended up with was way too cumbersome, regardless of its ideological orientation. The rules you had to work with were a joint effort by lots of people with no clear responsibility to any one person.
Whether or not Erwin's changes will help, I don't know either. But I actually doubt there will be half as much change in the authority structure of the place as most seem to think. It's still a Christian forum, and that alone will be enough to prevent most non-Christians from applying to leadership or heading into the Congregation forums. What's changed has less to do with what views will dominate the forum than the mechanisms available to express that domination.