With peel switch, often times a certain offensive action requires a 3, 4, even 5 man switch. I went back and watched some of the defensive breakdowns in our first two games, and a lot of times it was a late/missed switch on an earlier switch up the line (usually it was a big) and the guy closing out late wasn't at fault.
Which doesn't necessarily surprise me, I think most of our bigs are not accustomed to switching and defending the perimeter in an NBA-esque positionless kind of system. They'll get there though.