Is it better to make the decisions yourself? Well, depends on what you mean by ‘better.’ Faster? Yes. More efficient? Yes. More effective? Hmm—maybe not.
You, of course, never do this. You are totally objective and above all such pettiness.
In the last post, I covered whether to deal with underground, and often incorrect, employee perceptions. I think you need to as a manager and doing so will help address one of the most pernicious undercurrents: groupthink/group conformity.