Slipknot sliver in Hamburg

Saw yesterday in HH as the opening act of the Slipknot guys.
The audience could not be carried away, too bad. Musically I found the group insanely strong, especially the drummer has made a great (slightly over-spectacular) job. Unfortunately, there were 2 big minuses. The song was not particularly well mixed, so that was quite hard to understand from the texts, thus remained only dull growling of frontman.
Added to this was the exaggerated drama of the singer who threw regularly and rolled on the ground .... that seemed a bit ridiculous in my eyes. But the band definitely has great potential and the will (and now we come to the album) on this disc considerably.
Of course, the lyrics are very hard and have high Agressionspotenzial. Looking at the past of the character (and especially the situation of youth in Flint) processing is, however, quite understandable.
I have explained myself pretty intense with the lyrics and think that we will definitely hear from this group and should!
I prefer a star off because the singer should mature in his stage work yet.