AMEC has high aspect ratio etch so it should be an option for expanded lines.They designed their processes using equipment from KLA, I don't know but I think KLA rely on cloud services for data analysis, if that service is integral for their process or if the equipment doesn't work properly without that service, that will be a problem.
They would have to redesign or find workarounds using Chinese tools from RSIC, Shanghai Jingce, DJAL, an Xray metrology company in China when their tools come online and a Chinese company that I think do data analytics for metrology in China.
Another issue would be high aspect ratio etching, According with a post here their process was designed using LAM tools, I don't think that those require any special service to work properly, but anyway they will have to find workarounds maybe working with AMEC or Naura if they want to keep expanding.
Even Koreans are using AMEC since 10 years ago.