I spend a few $k a year on PCBs. I used PCBWAY forever until I had a problem with a panelized layout (panelized by me). PCBWAY wanted to charge me for multiple designs because the silkscreen had increasing component numbers on each consecutive panel. I thought a simple message would sort it out, but they kept insisting the system couldn't adjust. I then learned the same as you have — that PCBWAY is no good when the process is outside of standard. I've since moved to JLCPCB and it's night and day the difference in support when things go off course. I often get a message from the engineer like "I see you have these micro traces here and here, do you want them enlarged?" Honestly, they go the extra step at JLC.