He's definitely overrated. However, Dustin is a better fighter since they fought the first time, and Conor's passion for fighting has diminished since he is worth a few hundred million dollars.
Remember, not only did he make great money from the Mayweather fight, he sold his stake of his Irish whiskey for a few hundred million more.
He is still Dana's biggest draw/cash cow, so they are still going to hype him until the wheels fall off.