Hold up. Regardless of whether the media appreciates this point, a memory corruption bug in a relatively restricted (compared to the wealth of JavaScript) protocol like TLS has a decent chance of being very difficult to exploit reliably on modern systems, probably including the NSS bug you mentioned. The NSA might be able to do it, but it's not magic, and failure has some possibility (though low) of being detected; a bug like the current one, an exploit for which is basically 100% reliable if set up correctly and is probably less likely to be detected if not, is going to be a lot more appealing, and sniffing data rather than executing code is probably usually good enough for its purposes. Many other adversaries won't even try difficult exploits, but can easily set up this one now that it's been disclosed.

Admittedly, the above leaves aside the elephant in the room - regular old browser bugs, which are vastly more common, more likely to be reliable, and for the aforementioned other adversaries, relatively easily leveraged with exploit kits. As I assume you know, browser sandboxes provide protection against renderer bugs on MitMed or attacker-controlled origins being used to hijack a HTTPS site (and OS-level sandboxes protect non-browser SSL applications), but sandboxes get popped all the time and one of the two targets of this bug, iOS Safari, is single-process, so meh.

I agree the coverage of this bug is overblown (...depressingly, since that's just saying that modern computing is drastically insecure); I strongly doubt it was introduced intentionally, or that the NSA, if it knew about it, was "relying on" it in the sense that the disclosure is a huge loss. But it's still a particularly good bug.