Donna Brazile forwarded a single question to Podesto. The optics looked bad, but, as the email chain showed, it was a question they already had an answer to.
Believing this "proves!" anything is ignoring the facts.
She stepped down early, and was replaced with DB, an even bigger Clinton fan.
By July 22nd, the entire party was in unity mode, and Sanders was actively being courted for his endorsement. DWS resigned as a sacrifice play.
As for the email question, it wasn't making an excuse for it, so much as it was pointing out it had no effect on the proceedings.
Either way, I believe this thread shows how little the DNC hack revealed.
Here's one example to start...
http://www.independent.co.uk/news/people/wikileaks-emails-de...
https://wikileaks.org/dnc-emails/emailid/8351
>"Yes, Super PAC paying young voters to push back online on Sanders supporters"
Still, a Super PAC is not the DNC. I'm sure pro-Hillary Super PACs were doing (or at least considered doing) quite a few worst things than that.