I agree with adding a "test" to the game. They already have some, during class quests that usually require you to do a certain thing to win correctly. So why not build on this?

In my opinion, after you have reached 50 you should be required to pass a "max level" or I guess "raid" test, which requires a certain DPS level (meaning you need to form a decent rotation) while dealing with avoiding an assortment of mechanics. If they are not going to allow people to see how much DPS they are doing so they can form proper rotations on their own, then they should do something like this.