You'd think that giving elemental accessories and what common stat they always have, avatars would be the same. Well at least that's what the rumor and theory use to, such as people swearing up and down Shiva was the avatar with the highest INT.
Stated before, they would like us to use or avatars based element, now the damage based on what blood pact is most powerful, yet there would be more diversity between what avatars we'd use if they were going by stats. Such as using Titan as a viable tank to soak in damage instead of the whole kite/resummon deal we've been doing since forever. Then again the argument against that very same example would be spamming earthen ward every chance we get... harsh use of MP back before level cap raise.