I think the process should be as simple as possible, and improved later. Just select the absolute bare minimum that could start to work and discard everything else so this project can work again.
Depends on what you mean by simple. Using some less-than-simple tools can make the workflow very simple. I believe that we need to establish a set of very high-level workflow requirements. Then we have the top level roadmap that could guide a simple initial implementation and could be improved later with the same objective in mind.
That does not preclude any change in direction, requirements can change too. But the roadmap would be controlled by consensus approval (not the implementation! only the roadmap). Such a roadmap would unify our mindset and unify our sense of purpose. There is anarchy, rogue behaviors, and distrust now that could be fixed by a simple roadmap/high-level requirements that makes sense to everyone.