I really don’t see the appeal to them seeing as most decks work without any back row whatsoever and with 3 in your deck your basically hoping to survive off 1000 life points. That’s perfectly fine with decks like Aromage or Cyber Dragons but those deck already have great backrow control without it. In my opinion it’s overhyped but if you having fun with 3 CC then I’m happy for you.
Your goal is not to use all 3 of them, you run 3 cosmic to draw them early and use them to remove backrow and then activate your skills. A lot of the best decks are quite backrow heavy such as shiranui and invoked, not to mention WoD/drowning is still being used to catch people off.