Prime time! I'm kind of in love with these models, hope I will get them to the table sooner rather than later.
@Sandra
One if my warbands is Stormcast Eternals Warrior Chamber, which is widely regarded as one of the worst warbands out there. I'm still doing fine, but I also only play at a kitchen table level where nobody has optimized warbands.
I believe it mostly comes down to being able to stack units. When you only have one of the chaos warbands, you have the models in your box and that is it. If you then match with someone who has an AoS army and can basically pick from all units, that's an issue.