I used to vastly prefer the old control panel hands down but the last couple of years it has been in that awkward "a lot is better on the new one but not everything" stage.

E.g. on the legacy "Sounds" none of the per app mixing, device pairing, or new filters like toggling global mono mixing are there. Some power user things are also just easier, like adjusting the non-primary sound device volume doesn't require going into the device properties and flipping to the tab for each device you want to change the volume of - it's more combined.

On the flipside the legacy "Sounds" disabled devices didn't clutter the view and there are advanced options not present in the new sections. It's also much more space efficient... though sometimes to its detriment in that the windows can't be made larger and it relies a lot on modals which can be easy to misplace and get confused on (but also useful in that they can let you see more of the information without having to flip back to other screens).

That repeats for me about everywhere. Either alone I'd probably be more than happy to use at this point but that there are two places to go each offering not quite the same set of features is the real pain point.