Because I don't want to "suddenly" change the table...

Well all of these recent updates have been subtly buffing giants. Have you noticed that that, now, ignoring the existence of shield and armor masteries, giants have the highest defense and magic defense because of their strength and will, and only a negligible difference in endgame int which doesn't matter because magic protection eventually stops being a useful stat once you're endgame intelligence. Not to mention changes like, being able to use alchemy skills and shield mastery with lances in later updates.