I don’t think downgrading keys from the vault is the way to go. It’s sort of anti social. A lot of people don’t want to run with people they know will lower the chances of success, and by having the vault downgrading the keys too, just makes the incentive to give players and specs you don’t “trust” as much, less chances.
I am fine with key’s lowering on failure, but I think the vault key should always be based on the highest key you did that week, be it timed or not timed, to incentive players to bring “lower quality” players or specs at least some weeks, without being punished for it the week after that again.
Some people chain mythic+ a lot and won’t notice this change. This hits the less active players way harder. As I said earlier in this thread I am on a 2 week break now to try lower tension caused by lack of mythic+ runs in my case, as I seem to be less desired for the keys I actually find challenging and fun to play. Part of this seems to be that groups prefer shaman or paladin healers, and in general run with the best class combos for the highest chance of success. Leaving those of us who play less desired specs to lower quality keys and “leftover runs”. Not saying it can’t be that people just don’t view me as good enough, but it seems to be a meta pattern in the ones chaining mythic+, and I have had a few comments about playing the wrong healing spec.
In the end I feel like I end up with doubble punishment or more, and it gets to me. I know it’s just a game, but I really enjoy mythic+, my spec, and I finally have time enough this expansion to play more of it… then I get other factors pushing me out of it. Last thing I need is downgraded keys in the vault because we didn’t time a key I could have timed another time, and causing even more negativity around running with “sub par” group comps.