Why that is the matter ? The problem is in bad project management, technical leading and outcome management instead. Solve those issues first, and there will be no overrated people.
This is precisely what's happened in our company. The project management head was not a servant leader and actively avoided doing real work while telling others what to do and promising to do things that never happened. Sadly, this person is still with our company at the time of this writing, but thankfully not anymore in a role where they can derail work. What really struck a nerve in me was that I had to catch all…
He was kicked but project was so mismanaged that the next 2 PMs outright fucking left, with last one throwing comment like "well, they told me that they will be throwing me on deep water but they didn't tell me it will be with concrete boots on!".
To be entirely fair fuckup wasn't totally his (the person involved in selling it to customer sold Perl based piece of software that we only had to "lightly customize", that turned out to be a lie and we had no Perl devs on staff, so it turned into some monster...) but still.