I know a team like this. They delegate relatively junior members to take inbound design consultations from other teams. They string you along for months with a tentative alignment. Then finally the real decision-maker reviews your proposal, and he wants a total do-over. So you've got 6+ months with nothing to show. Just incredibly antisocial behavior that has caused hundreds of wasted engineer-months and gotten some very talented engineers I know very nearly fired.

Upholding a strong vision is fine. But if you want to be a blocker, you've also got to be quick. The alternative is a bureaucratic death spiral.