devtrackers.gg
Vaulting is absolutely fine, as long as they keep refreshing them every so often.
Honestly, as someone who was playing this game at a near daily basis for a while but haven't played in months, I have to disagree that vaulting is fine.
Regularly rotating the vault would at least solve part of the problem, of coming back to play once a month and seeing stomping ground again, but it wouldn't solve the problem that the current playlist rotation is too small and gets boring within a single night of playing, let alone potentially playing a couple nights a week.