Rafaela has NEVER played a professional season where he didn't play the IF. He began his career as a MIF guy. He tried CF as an experiment in '19 that worked. Blaming his offensive woes on Cora is wild. Rafaela will always be a rollercoaster offensive guy due to his whiff rate. He has sky high talent and can reach nearly every ball, but has zero idea what to lay off of. It's been that way for years and isn't going to change. Not Cora's fault.
Campbell played 5 defensive positions prior to even showing up to Spring Training this year. Cora never put him at a position he had never played before. Be upset at the org, not Cora. Not sure Cora is at fault for Campbell's terrible defensive performance at 2b/SS, which caused the Sox to move him around the field to begin with.
I don't even know what to say about the Duran stuff. There is such a small difference between LF and CF that if his production falls off because he's shifted over, he needs to go elsewhere. He hasn't been very impressive in CF this season anyway. Duran has always had some questions about his defense. He's just not a natural out there. They've worked on it for years and he doesn't really track balls well or get good jump. He uses his quickness to catch up to balls, but that is going to eventually not be there.