Posting on behalf of blueduckyy who came up with the idea
Can there be an achievement (or better yet, a title) of “Shardmaster” that is awarded if you complete every shard level of every dungeon? It would encourage people to work together to find certain level shards of each dungeon, and to not skip high/low levels of certain dungeons because they take longer to get through. And create another goal to achieve for end-game players.