Maybe the higher quality work just hasn't been leaked (yet)?
Could you expand on why you feel the CIA in particular would have high-quality remote exploitation capabilities? Assume a talented hacker wants to join the government. Why would they choose to work for the CIA and not the NSA or the FBI?
I'm not saying the CIA does second-rate work in general, but perhaps their remote access work is second-rate in comparison to the NSA/FBI and to the very talented echelons of the private sector.
That was exactly the vibe I got from the leak as well. I don't know why people are going crazy over this, thinking Notepad++ or all Samsung SmartTVs are backdoored.
Who knows, maybe LD_PRELOAD is also an amazing method to hack programs?