Yes, but politically, "we dropped her sentence to seven years in jail" is more tenable than "we pardoned someone who never stood trial nor served a day in jail".
There is no extradition request to the U.S., so when fighting an extradition to U.S., Snowden is beating a straw man.
Commutation is reduction of sentence, it can only happen after conviction.
> Like 97% of the cases that go to prosecution in this country, let him plea to a lesser crime
Is there any indication that Snowden has any interest in pleading guilty to anything?
Not that there is no precedent of course (Nixon).