No, just like the IRS, and soon to be VA scandals, it's been stonewalled to death. For intance, with all these investigations, how come we still don't know:
WHO refused the added security that was being begged for by Stevens, of all people?
WHO authorized the stand down order for no attempt to rescue/defend?
WHO authorized the changing of the talking points in removing all form of "terrorists" & Ansar al-Sharia, which WAS DETERMINED WITHIN HOURS, by the CIA, as the source of the attack, but even weeks later, making it about some obscure video that no one saw??
Contrary to a certain want-to-play president, the difference matters greatly
So, yea, the GOP can call for hearings on the NSA, that will accomplish prescious little, in changing anything, because the GOP is in no position to change anything, not with Dems in charge of both the Executive branch & Senate. And there's no reason that both investigations can't be ongoing, since the Benghazi debacle actually led to preventable deaths, with the cover-up making the WH & State Dept's actions wreak all the worse