Well then we have different standards because to me the staff of the DNC who are required to be neutral secretly working to put Clinton ahead of her rival is a very concerning thing. I don't like the idea that hired staff, required by their job to be non-partisan are secretly conspiring to put their favoured candidate up as the presidential nominee. That's a big thing. As to arrests, well when the head of the FBI refuses to even bring charges what can you do? There's enough evidence of wrong-doing in there to put Hillary Clinton on trial, but he wont.
I don't think it is a "well-known fact of life". I think if you asked many people in the USA if they thought the Democrats would give someone a federal position, e.g. that they can get an ambassadorship, because they donate money to the DNC (or in some of the cases, Obama), then many people would be upset to learn that. You say it's routine but The White House denies it happens. Now we have contrary evidence. Buying a position as a United States ambassador may be below your cynicism level but to many of us - yes, that counts as something revealing and unpleasant about the Clinton campaign.
Again, we clearly have different standards. It's one thing to be cynical in general, it's another to find out that the chair of the DNC is actively working for one candidates success (she wouldn't have resigned if nobody thought it was a big deal). It is a big deal - you're abusing your position to try and choose one of the two realistic candidates for the position of US president. I'm pretty sure that wasn't in the job specification. People care about things like learning that Hillary had been provided the questions in advance in a debate against her opponent. If when some pundit remarks how she handled questions better and you then find out she had everything the day before, yes, that really makes a difference to what people think. It's corruption. And there are still a lot of people to whom that is not "a completely damp squib".
I doubt they would be as "juicy" and I'll say why. Firstly, Trump can't be embarrassed. Pretty much all the reprehensible things he has said he has said in public and is actually proud of. Secondly, to suggest there would have been an equivalent leak is to suggest there was an equivalent conspiracy at the heart of the RNC and we don't know that this is so. Indeed, there is reason to think there isn't. The senior Republicans who took up arms against Trump did so very publically. The division and partisanship in the upper ranks of the Republican party was conducted openly. And if you're about to insist it wasn't, I'd point out that the Republican party was openly discussing disregarding the outcome of the primaries and disregarding the democratic result. That's about as big as it gets. There wasn't the situation where some individual behind the scenes was distraught by the secret conspiring against a candidate (Trump) because his opponents were yelling their heads off about it. Whereas with the DNC there was an active and secret campaign to keep Sanders from the nomination which is in all likelihood what prompted a member of the DNC to leak those emails. Leaks occur, at least ones like this, because someone is upset and wants to expose the truth to the outside world. The Republican leadership shenanigans were already national news. Additionally, Clinton has been Secretary of State for years and has a long history in the senior ranks of the Democrats. Trump is an off the wall outsider who has just barged into the political landscape like an elephant in a toupée. So no, you're probably not going to find the same sort of evidence of pay-for-position or media complicity with him, honestly.
It's shocking to say, but I believe I can reasonably argue that Trump is less corrupt than Hillary Clintion.