I don't think anyone's found the sweet spot yet on player input mid-dev. Subnautica's trello votes seem like the most the productive variant I know of. Devs still control the shape and workflow ultimately, but get an idea of playerbase preferences.So, neither the dev's or fans can win. Both sides lose.
The short story is always going to be that design by committee is pants though, and most good games will still require vision & luck to be fusing away behind the scenes, fighting through their existing committee challenges. (Communities can help fine tune features better than they can help design them is what I reckon )
Obviously guys who got a say during Elite's alpha must feel the burn of ED's blackouts all the more now though.
(I'm fine with the principle of giving devs time to design. Less so for the marketing hype-management that piggybacks along with it though )