My thoughts on this is that Blizz should avoid adjusting things based on “raid tiers”. Not everything needs to be hyper-focused around raiding. This is especially true in Classic. Balancing classes/specs/builds is also a pipe dream in and of itself, as at no point in WoW’s long history has the classes been truly balanced.
They’ve also said they aren’t balancing classes for Classic. The devs can chase their own tail in Retail.