Seriously, are you so naive about how international politics is played. OF COURSE there was a quid pro quo. But no negotiation or deal was involved. Flynn says to the Russians, "I'm just speaking hypothetically here, and not as a matter of US policy, but it might be in everyone's interest if Russia declines to retaliate against the Obama administration." The Russian counterpart says that he will mention that to his boss. 

The Russians know exactly what Flynn was saying, but no negotiation took place nor was any bargain struck. The Russians decline to respond, and 50 experienced US diplomats get to remain in their posts in Russia.

So again, tell us how that's a bad thing.