It would be awesome to see job specific categories rebuilt. I would say a good half of the options in cat1 and 2 are too weak for people to consider upgrading. Take Thief's category 2 abilities for example;

assassin's charge - forcing a triple attack is great but most dagger weaponskills that are used already hit multiple times making the ability less effective. the recast is also too long unless you go 5/5 and even then it's still forever.
feint - dropping target evasion was awesome when this ability was first introduced but since then tons of new abilities, spells and gear were also introduced making this ability largely useless.

I could keep going but you get the idea. job specific merits need to be reworked to fit the current game.

Also make a category that includes; regen, refresh and movement speed.