SO I have been reading this and mulling over the problem today. We know that they are going to do what they are going to do, but I would hate to loose the individuality of my tank. What if they add job specific side effects to the skills.

Now this is just me spit balling here, but something like -
Rampart:
PLD - higher damage reduction (maybe 25-30% instead of 20%)
WAR - only 10% damage reduction, but you get 10% of the damage taken back as HP
DRK - 10-20% damage reduction, and get 10% of the the damage taken back as MP

This would still allow for individuality between tanks, even for shared abilities.