You could try checking with different service centers and see if there are shorter wait times at any of them? Otherwise just get your name in. I think for a compressor they shouldn't need to keep it that long, you may be able to get an appointment sooner if you don't need a loaner. Personally if it's not going to be multiple days I prefer to Uber instead of messing with a loaner, especially if it's through Enterprise.
In the mean time you can try turning on Range mode. Your car won't get as cool as quickly, but it may mitigate some of the noisiest periods of operation. You can also get in the habit of starting to turn on climate control from the app a few minutes before you you leave.
Also as an aside, this summer I finally got around to getting heat-blocking tint on all windows, it really does seem to help how hard the A/C has to work. I think they used this stuff: 3M™ Automotive Window Film Crystalline Series | 3M United States
Thanks for the infolrmation. BTW, had SC appt on Monday. They replaced the outside air actuator and Amazingly, the AC is cooling great, the battery usage is back to 250-320 wH/mi and the compressor is quiet like it was when new! I wonder if that all could be due to a faulty valve?? I hope the next firmware update doesn't undo it all.