'Clutch continues to turn slowly.'
I'm not your master but do as I said, reset the airgap. It might save you so much and potentially far more trouble. You are most definitely headed into the wrong short circuited thinking, but yours and do what you will. EVERY time you break open a system you risk more damage.
The noise is the clutch barely scraping. Compressor is likely fine if getting cold and kinda (really actually) dumb to do all that over when all you need do is yank one little 8 mm. head bolt and reshim. If clutch is engaged and no whine then it's NOT compressor. Listen close between on and off and compare. On quiet and off whine is clutch not compressor. Or yank serp belt and then spin clutch, bearing in it could be bad. That could point you right back at your desired compressor change.
You really need to reshim wider at least once to see what your issue is. It may be all you have to do. The shims are expensive but I've used washers from a hardware store at 30 cents each to do that before. Are you going to pass up a 30 cent fix???????????????????
Again, yours and do what you will and what they commonly do. I watched many thousands of dollars go out the window when I was in parts with people misthinking the order of things to cause themselves huge amounts of money for nothing. Like the compressor thing. 95% of all compressor changes are for NOTHING, I have never had to change one ever on an endless stream of cars. At the part store most of those were un-needed too. People have no idea that the a/c mechs commonly want you to do that for mostly no reason other than it makes them LOTS more money. Think Obamacare.
I have fixed a/c countless times on my stuff and using less than $25 per time usually. To go for years more with no trouble until something breaks again. Almost always NOT the compressor.
A tip.....................the drier stays useable if you plug it securely as soon as it is disconnected, leaving it open for 24 hours to the open air ruins it (and even then I PERSONALLY use them again to no trouble at all). You just gotta know what you are doing there.
Now, if you failed to replace the oil in the compressor and drier (each requires separate amounts) when you did your work, then compressor might be wearing at the internal end clearance limiter there and thus affecting the clutch clearance again. Up to you to decide that.