I scanned the reports I could find and see that investigations were done, and recommendations were made. I don't see what the remaining issue is - a list of "unanswered questions" from Issa or the subcommittee would be good. Do heads have to roll?
As far as "unusual" lapses - I believe that is the wrong way to view it, and is what brings up the tu quoque charges. The proper way is to view the attacks within the ecosystem of embassy security and the interactions between State and DoD, and whether systemic solutions need to be developed. Looking at the reports I have seen, that appears to have been the approach of the investigators.
As far as reviewing the full committee hearings and the approach of the House members, I don't have the time or patience to listen to congressional droning, and there is a cloud of partisanship in the media analysis. Grandstanding will always occur. The key thing for me is: has the congressional hearing process terminated?