I personally think it's just too soon to make such large assumptions about what the exact numbers are. It's, for example, possible that WAR and DRK will decisively beat out PLD's MT DPS despite the additional abilities PLD is getting. We just can't know for sure. What we do know though is that problems may arise with interclass balance if their abilities to do damage are not close enough. However, for all of the failures SE has exhibited when it comes to balancing us against the enemy, they have proven themselves very competent at balancing classes against each other. I see no reason to assume that they'll shoot themselves in the foot in this particular regard. All we can do is wait.