Great idea, 100% support. My only real issue is that I hate the idea of hard locking maps behind a progression wall. The maps should always be playable and they should get ticked off as you pass them.
Some things to consider though. We need someone to make a map progression list. There's no point implementing this if there's no established, tested progression list. Creating the list can be done by literally anyone(s), so if anyone reads this thread and truly wants this to be a thing, get a group of people together and start listing maps. If someone makes a good list I'm sure it'd get implemented after the new client is released.
Some things to consider though. We need someone to make a map progression list. There's no point implementing this if there's no established, tested progression list. Creating the list can be done by literally anyone(s), so if anyone reads this thread and truly wants this to be a thing, get a group of people together and start listing maps. If someone makes a good list I'm sure it'd get implemented after the new client is released.