Did we learn anything we didn't know?  No.  Did this have an affect on Trump's credibility?  It completely set the constant deception and lies on their arse.  The Trump-bots can no longer minimize the Russian tampering with the election, the need for an ongoing investigation, the reason that Comey was fired, and Trump crossing the line in trying to protect Flynn.  All of those are significant factors in seeing Trump for who he really is.