It's not just Kiffin. Anyone thinking we're set at safety is delusional. The Tampa 2 does not work without the right safeties, and we have neither (JJ was playing well, so there's maybe one). Church is better suited as a LB in this defense, JJ is an SS, so we still need a good cover FS.
We constantly ge beat past the LBs and underneath the safeties. Our CB play is decent, but we are weak in mid to deep coverage.
Besides, our offense was putrid today; I honestly think that was a bigger problem.