This thread doesn’t make sense to me as the deckbuilding aspect of this game puts you in control of difficulty and challenge level. If you’re flying through ranks too fast with face hunter or shaman then just swap your deck out to something that’s harder to pilot or has a lower winrate. You might lose more often by giving yourself a handicap but at least you won’t feel a lack of achievement by hitting legend immediately with a tier one deck.
I think what actually happens is that people with bonus stars fly through the ranks with face hunter and then try out their fun ideas for decks once they are safely in legend. Which is what makes diamond consist mainly of the top meta decks.