Workplaces aren't democracies nor should they be. But, managers need to be judicious in deciding when to "vote their 51%" or they risk making their team feel like their efforts have been wasted or under appreciated. While at times it can be uncomfortable to deliver critical feedback, as a boss you owe it to yourself and to your team to do this as early as possible so they can help you realize your vision effectively.
Don't tell people that they've done a good job when you wish they had done things differently. If you're unsure, you should say that you're unsure. If you feel the need to get input from others, then say that. As a team member, there's nothing worse than thinking that you've done a good job only to have your work thrown out at the last minute.