As per Fujihita stated and I shall paraphrase: "Nothing about this discussion is official. Most wiki staffs have expressed indifference on the class designation and disapproval on the change. Accordingly, should edit war break out as a result of this discussion, status quo (that is the CVB designation) will be enforced. This thread is closed by the minimum one-half (6/12) administrative poll (For votes: Fujihita, Admiral Mikado, ArticaFrost, Nanamin, Dechidechi, The Lenrir)"
CVR - The idea behind this designation is that the R stands for "reinforced". In other words CVR would mean "reinforced aircraft carrier", which would be a fitting designation for the armored carrier Taihou. The merit of this proposal is that it does not collide with any existing code and thus it can avoid misunderstanding.