I definitely like your ideas, in all honesty I don't like the idea of getting rid of MAB either, it just seems fitting since with SMN they did just that, they removed the MAB for your Avatar and gave it a straight % so I figured it would likely be the same here. That being said, unique Aftermath, some INT, same MAB as now, would be awesome, the only thing I don't want is to lose Elemental Seal, while I know its not something you commonly use it is something that works wonders for Meteor which is great for things like AAs if you take 3~4 BLMs.