I've flown in Club with Mixed Fleet quite recently and the service took 3 hours. I noted that it seemed slow but that seems to be about standard. It certainly wasn't 4.5 hours. That was 3 hours from wheels up to last coffee cup. Whilst that's acceptable on a daytime flight I found it annoying on the night return sector when I just wanted to get some sleep.
One thing I did find refreshing as a staff passenger was that the crew were genuinely friendly on both sectors and I didn't feel I was part of the usual staff travel lottery of whether you'll get a decent crew or a bunch of miserablists who want to make your day unpleasant.