I hate Reg. CC and will choose to have root canal before taking charge of it again. So I can't speak to the attributes of CC.
While I believe you are smart to choose your battles, if this is a big issue and it will continue to be so, ask the EIC for verification. While the ombudsman is an option, I have always been told it is fine with the regulators on-site if you want to go that route. While they sounded genuine, that may the required talk-off.
But you should feel free to question the EIC. Just as we have this forum to use, they have one in which regulators share ideas. Have it queried there. The EIC should be receptive to gathering a second opinion unless they are absolutely sure of their position.
And if you continue to question it and forsee costs or repeat violations, go to the ombudsman.
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Andy Zavoina
Opinions stated are not necessarily that of my employer.