In fact, the majority of disclosures were foreign in nature, and of those, quite a few ran counter not only to American foreign policy and security interests, but Western interests in general.
The articles exposing intelligence activities in Indonesia were but one example.[1]
Indonesia is such a nice, non-repressive country[2], and it's not like they aren't making significant progress on the human rights front[3]. How dare western intelligence spy on them. /s
Other examples include severe damage to foreign relations with China[4], coverage of offensive capabilities such as network infiltration and hardware implantation[5], the CIA using co-traveler inference to shake tails in the field [6], and more.
Today's news is certainly a positive thing, but I think it's fair to say Snowden's whistleblowing is far from responsible, even if it isn't wantonly reckless (i.e. Manning).
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[1] http://www.theguardian.com/world/2013/nov/18/australia-tried...
[2] http://www.hrw.org/news/2011/06/08/letter-president-yudhoyon...
[3] https://www.hrw.org/news/2015/03/04/indonesia-begins-roll-ba...
[4] http://www.theguardian.com/world/2013/jun/13/snowden-revelat...
[5] http://www.spiegel.de/international/world/the-nsa-uses-power...
[6] http://www.washingtonpost.com/world/national-security/nsa-tr... (very last paragraph)