I think your argument is fair, in that the East is certainly at a disadvantage with the time shift and that the East has some phenomenal individual talent, but when you watch a Western matchup (i.e. West v. West) you can clearly see the superiority of the systems. The margin of error in the West is just that much less.
Even if that wasn't so, I would still disagree with having equal representation just for the sake of so-called "fairness". That argument doesn't fly Imo.
For argument's sake, other than Green, who would you want included the D-corps, from the East?