So we have these design values for League, and I try to refer back to them constantly.The TLDR for these is: mastery, meaningful choices, teamplay, counterplay, clarity and evolution.A healthy game state is one that is delivering on the design values. For example, when one ADC is just flat out better than the others, then we lose out on choices, because players feel forced to pick that one champ. While we are working through our backlog, we still have several "ball o' stats" champs that don't have great counterplay (since counterplay implies some weaknesses you can exploit).Under this definiton, a stable meta is *not* healthy since it violates meaningful choices (you have to play certain comps or strats) and evolution. I think it needs to be stable enough to deliver on mastery (in other words, you should be able to leverage your knowldge of the current state of the game to make the right choices) but we actually like when strategies and comps drift over the course of a season, particularly when players are driving that (shifting to X because that beats Y and then to Z because that works well in an envirinment where X dominates, and so on).I also want to add that a lot of this shit is subjective. Game development involves a lot of gut checks and intuition and we don't get it right 100% of the time. We are human.