There's not much to be done here except resort to office politics. Lean on throwing out their architecture and ideas when they say "just figure it out". Lack of

There's not much to be done here except resort to office politics. Lean on throwing out their architecture and ideas when they say "just figure it out". Lack of direction from them is where you have to assert authority of your expertise - this is where they're giving up control. You essentially need to turn them into a source of simple problem explanation rather than having them give you ideas, unless they can produce code themselves. Determine if dealing with their technical misunderstandings is worth the time invested (few are actually interested in learning technology, but try not to assume).