I would like to see merits added to your achievement points. It doesn't make sense to me that you could have 2 people with the same exact character, one with 0 merits and one with 800 merits, and they would have the same ranking.
I don't think this would be too hard to implement, you could either just add the exp from merits straight to their job level exp, or perhaps have it be it's own separate calculation.