Good grief, such slavish devotion to such a wild and wacky 'interpretation'. From the biographies I've read, Mahler hated Kassel, so perhaps they're wanting to 'make good' for Mahler.
Anyway, I just listened to the first scherzo and "Purgatorio". If you want to get an idea of just how much Yoel likes to exaggerate between fast and slow sections, just check out the short "Purgatorio" movement, which begins just after the 42 minute mark. He also amends the tam-tam stroke at the end of the Purgatorio to a full fortissimo (I think forte or even mezzoforte works better). The start of the second scherzo (fourth movement) is so bizarre that I just can't handle it right now. I'll do the last two movements in my next listening session. I'll say this much for Yoel Gamzou, he certainly knows what he wants!
As I recall, Gamzou made a number of significant cuts in his first performance posted on Youtube, so perhaps he hadn't finished the job yet. I don't hear any cuts here, so far.
Yoel, if you're reading this, I can't help but feel that you could get better results if you would go just a notch or two slower with these orchestras that, quite obviously, are not familiar with your version. What you've come up with is extremely challenging, even for listeners.