Does Determination have some hidden affect not listed in the tooltip?

increases the amount of damage dealt by all attacks including auto-attacks, weaponskills and spells. It also increases the amount of HP recovered by spells.
We already have:
  • Weapon Damage
  • Magic Damage
  • Auto-Attack
  • Attack Power (STR/DEX)
  • Attack Magic Potency (INT)
  • Healing Magic Potency (MND)

Whats the point in having Determination as one of the stats? It kind of bugs me that it takes up a major slot in your equipment when the ratio is like 5x DTR : 1 MainStat. Might as well just tact on 1 more main stat.

If DTR increased Crit dmg or something I would understand but right now it just seems redundant.