Rene probably didn't go through because he literally does the same set of tricks in each battle/performance (if you've watched him even once, you'll know what trick is he gonna do next), because performance wise he was good to go through.
I have to admit, this kind of system, with 3 finalist isn't bad at all, the next round with 2 guys is maybe even unnecessary.
BTW, does anyone know who was the 3rd judge?