The difference between Alexander and Snowden: the secrets are for sale.
It's absolutely a story worth re-discussing. With that said, there's additional HN discussion from the ForeignPolicy.com story that Schneier links-to here:
So he was at NSA for 9 years, time in which he came up with his "own ideas" about cybersecurity, that he never shared with the NSA in all this time, which means he didn't do his job very well on purpose, but then used for his private company weeks after he left NSA?
That sounds less plausible than him just stealing NSA technology/secrets that he then begins to sell/use in the corporate world.
It makes you wonder, given what he knows (or knew) about the NSA why he would do this and not have at least a little fear of them spying or coming after him. Do they have less capability than we give them credit for??