1) That's my understanding.
2) If you take out at least most of the "lows", yeah. Obviously his part in the campaign is now downplayed and he's being distanced from Trump.
3) If by "actually PAID for Russian-sourced" you mean paid a brit to investigate, and by "dirt" you mean evidence of foul play during the campaign, yes.
4) Apparently Hillary bailed the DNC from their financial debt and the allegation is that she expected the nomination as payment. All of this was known already at the time and criticized by Bernie's supporters, nothing really new from Brazile. Also the timeline of the events is a bit muddy, most of this likely happened after her nomination was a done deal anyway.
5) Yeah. Let's just wait for Mueller to finish his job.