Just my opinion, current tier standings would be like:
S tier: carvings, mutation
A tier: control nature
B tier: relic war, guild deception, atlant magic, aggro war, heal light, bomb dragon, ramp magic, BE
Control nature gets a special place in the tierlist since its slightly weaker than the other 2, and slightly stronger than the others.
Theres a lot of skill gap even between the top mythic players, and winrate of deck archetypes wont accurately reflect the overall strength of the deck. The said really good players stick to a certain archetype solely due to the fact that they chose to shine a certain deck and dont want to switch to another one due to the cost. And the ones that are not as good but want to stay in mythic and get 300fragments/day play mutation nature, carvings etc
Personally I have 65% WR in 300games playing a 6$ deception deck cuz its all diamond. I used to get low 70s playing carvings in the same amount of games and I know for a fact its an overall stronger deck, but I aint playing that anymore for garbage fragments If all my carvings/mutation cards were diamond Id be playing it too, and so as all the other good players. Then the average WR of these decks would be waaaaaaaaaay higher than it currently is.
I tried Carvings a while back and I could never squeeze win rates like that. I would either get overwhelmed by aggro with no removals in hand or I wouldn't get Ulrika in time
Also worrysome is you implying the meta would be much worse if not for the warped incentives to play with worse-performing decks. You get baited into playing out of its misery/dreadwing on an encumbered looter, using ulrika as a finisher vs aggro whereas all these cards can be used for removals vs aggro and still win. And most of the time id be using carvings for board control with cavalry vs aggro and WR would be alot higher vs them.
