It's got all kinds of bad.
The core people who built the actual OS don't work on Windows now at all, they are either Research or they work on Azure. During the Panos Panay era, everyone left in Core stopped working on Windows and "Windows" took over everything. The people who were left all have left Microsoft.
So you have a lot of people who have little experience with actual OS development and lots of "application" developers working on their own little bits but ultimately they are not OS guys.
So they dug a gigantic hole and there's nobody to dig them out of it. I have no clue how they are going to fix that. (And most of the Azure people are simply long out of actually doing actual development and mostly only care about their "own" stuff.)