Trump said the same thing himself in his interview with Blitzer yesterday. Trump said he'd made some suggestions for convention performance to Romney, but they weren't taken.
I try to take in what Manafort says, because he uses precise language, and he's been a fairly accurate window into how he sees Trump playing to the public. Looks like he is "on the team" past the nominating convention too.
Republican Conventions have always been painfully dull.
Trump is going to rejuvenate the party in so many ways!