Implementing actual gameplay systems based on tier lists is well beyond what the devs have time to do.
But they could at least consider the use rates for troops and use that to consider buffs. If they published these numbers, they could be used to justify to the community why certain troops actually shouldn’t be buffed, etc.
As is, there are mythics that are used less than epics or ultra rares and not because of their rarity but because they are uncompetitive. That shouldn’t be the case.