I think the mage tower is a great initiative by Blizz. It is kinda a "Here you go!" to all the people who say the game is too easy, but don't do high mythic + (which is hard) or do mythic raiding. It is a solo event, you have just yourself to trust and you have to learn the encounter. Sure, some of the encounters are a bit easy, like the fire mage one that I did in 3 tries. But others, like the god queen is quite challenging and I have only completed it with my ret pally so far. That arcane artifact is a long time away for me, the encounter is hard and I can't play arcane... But it is fun. I like it and I hope they continue to make things like this. Something that is actually hard and makes you rethink the way you play your class. It is easy to do easy content and complain it is easy. This is a test. Are you as good as you like to think, or are you actually just a whiny scrub? Go try it out! It is fun and frustrating and I love it.