Just RTFA. All the way back to the original NY times article, it isn't specified what Snowden would plead guilty to. Presumably not treason - which he isn't guilty of in any event. He has done the US and even the world a great service.
Sure, there are "political realities" (which should be an oxymoron) dictating that Snowden receives some kind of punishment.
And I would consider letting him run it.
Alternately, and perhaps even better, I would "sentence" him to get together with some very smart people to put together a system which restricts the possibility of these sorts of abuses and the secret rules that make them possible. Then I might put him in charge of a board that oversees the NSA and other agencies, and their uses of their power.