Oh, it's heavier, but not a Heavy. Just don't blur it when talking about someone developing a "heavy" launcher. Falcon Heavy is definitely good enough for pretty much any need we might have in the near future and due to commonality with Falcon 9 it may acheive economies of scale that make true Heavies redundant.
My point was merely that you yourself were blurring the 'heavy' definition - since you included 70 mt instead of the previously commonly held definition of 100 mt. (from the Saturn V era)
But I agree with you otherwise. 50 mT will be enough for any exploration of the solar system (manned or not) that we want to do. If the FH becomes available at a low cost, then we can finally concentrate on building true spacecraft instead of dicking around with launch vehicles.