Never installed KM 5020i but brand new Brother originals don't ask for Time zone for sure, time is set via Initial Setup. Should Factory reset don't...
From what I can see on you thumbnail it appears to be the cleaning blade or paper lint build up in the or around the waste toner coil creating a lint...
I have had Ricohs where I had to require a specific User ID in order to print in color. If the 405ci can do that setting you get rid of the problem....
I think nothing dramatic in short term. After fiasco with toner shortage/outage KM is shaken and forced to release a "new" 1i models. The future will...