Here's the thing...
I don't think there is any "process" involved with the DDF. I might be wrong, but to me, it's just another forum like this one - slightly less busy (i.e. with fewer members) but FD will post in it more often & give us insights into what they're working on. As to our role within it - we won't have one per se. We will simply be the mob. Frontier will listen, take what we say under consideration, and then do what they feel is best... which may or may not be what the majority of the DDF want.
As for Styggron and the other forum moderators - presumably they were asked, and they accepted. That's about it.
We all want a good game out of this. We have to trust that FD are going to deliver that - that's why we pledged as much as we did.
At the moment, they are still (presumably) putting the team together, working how who is going to do what, what the priorities are going to be, and so on. It's the same as any other large software project in that regard. What's different is that they also have obligations to thousands of backers rather than a single publisher that they need to fulfil. But as they mentioned in yesterday's update, they're getting to it. Give them time.