Wouldn't Diona work just as well if not better than Zhongli? Coppelia does a lot of cryo attacks and the energy could be used to fuel your cryo characters. Edit: I just realized Coppelia probably has a lot of ice resist meaning Zhongli resist shred would probably be more important.
Indeed, Zhongli is in the team because Coppelia has 70% resist to cryo, but it is also there because it is very comfortable to avoid Coppelia's poise. Diona would work well, it would only be a few seconds more of run.