Sivok is having a good game, he's a pretty determined player, I wouldn;t blame him for that. How many people did Mehmet Topuz whizz by before he passed it to Aghahowa and then got it back and lobbed it in to assist the goal.
Kayseri's underrated four defenders didn't make any fatal mistakes while BJK did. That was the difference.
(Apparently, BJK just made the three defenders NT-bound and Toledo the best LB in Turkey.)
The 3-back isn't a problem per se. 4-4-2, with Uzulmez-Kurtulus walking in the back and Delgado and Ozkan (or Holosko) in midfield is far more problematic. In short, there's no way out. : )