Re: something missed...
Yup, I'm reading Gorsuch's dissent right now, and he quotes Professor Orin Kerr (coincidentally, the guy whose analysis I linked above) as saying “third-party doctrine is not only wrong, but horribly wrong.”
I'm pretty excited about the long-term prospects of Gorsuch's influence on civil liberties matters in the US. He's been excellent overall so far - not just the individual decisions, but the reasoning behind them.