Would lead to faster leveling, making gold even more useless, meaning heirloom pricings go up.
However, I kinda agree. If implemented the right way, it should be able to push the xp cap from 1450, that number is just so.. random.
I say it should be 2000 xp, at least you should be able to get 2x the amount.
This would totally kill the already fragile "economy" we have, so I don't know either.