Constitutional Convention? God, no.
Our original constitution was created by men who believed in limited government and the supreme rights of the individual over the State.
A new convention would be convened by Americans who have been trained for decades to believe that there is nothing in human existence that is beyond the legitimate jurisdiction of the government. I have no idea what would come out the other end, but I'm sure it wouldn't be good. (Conservatives and liberals can each insert their own favorite nightmare of government interference here.)