Just some things that come to mind on improving the game:

*Tweaking Requiescat: It's an OK weapon skill, but could use something else to jump up the damage. Possibly an MDB or PDT- multiplier to favor Paladins and Red Mages, the latter which doesn't have natural access to Vorpal Blade and no access to Swift Blade.

*Extending access to magian weapons. I've mentioned before that I'd support Archery Magian weapons being given to Samurai since they have the skill and the STR+ weapon would improve their stats. I also would support Beastmaters having Magian Scythes and Dark Knights having Magian Great Axes, to name a few.

*Treasure Hunter items for non-Thieves. I've always believed Thieves are more than this Job Trait, and introducing items with TH for all jobs can only validate this point further.