The issue, and this is a recurring Windows theme, was "replacement without feature parity"
Imho, nothing should be allowed to ship in Windows unless it at least covers 100% of previous functionality.
If there are functional gaps, those should require approval at the CEO level.
The Windows team has incinerated a ridiculous amount of goodwill with 80% replacements that leave 20% of previous functionality (often including important workflows for power users) lost.
The issue isn't that Setting was different: it was that it didn't do as much as Control Panel. And that's a fixable issue! Just build the additional widgets / plug-ins.