IMO they should have an in game poll... Which says "Do you own a PC/laptop/or xbox?" If there is a <5% vote that says they still have a ps2 then I say they should just do away with ps2 and update accordingly.
Even if 1% of the playerbase uses PS2 exclusively, forcing them off the game would still cut (an admittedly small) amount of income from SE.
Then you want to turn around and spend millions (or tens of millions?) of dollars to rewrite the entire code for this game to not include PS2 and it's limitations for a release that should be ready by 2016 if they start now?
Or was this one of those "they should snap their fingers and fix all the problems!" comments?