Again, I believe we agree on the facts but draw different conclusions. I think it is likely, probable even, that Russia was involved. However, not familiar with what you sourced so going on the post alone, the only evidence appears circumstantial, and one hacker was decidedly not Romanian.

Simply for rhetoric, I will propose a scenario that I do find possible. Guccifer2 was a fairly talented hacker who found and copied the DNC files and disseminated them. However, immediately the weight of NSA & US Intel closed in hard. Captured him, and are executing the scenario you just proposed but from the American angle.

Blame the Russians/anyone else, leak mostly trivial data, and a few larger but not extremely problematic things to feed the narrative, and then gain credibility. From there, you can use the alias as a hunny pot to attract others, destroy the credibility of guccifer2 hopefully calling into question the next persons legitimate attempts at such a feat, or continue shaping the narrative.

This disclosure seems extremely weird. The pay for play directory and the bro-ish shout out to assange are ridiculous. I can't see the payforplay directory being legit (he said that the photo was from dnc dir) and the whole thing just seems absurd. I haven't been following it enough, but hopefully he has been signing messages, and if not cryptographic proof, something nearly as irrefutable.