Does someone know what all the gift bags do ? Do any of those add new content/skills or are they all more like cheats/ease-of-use features ?
Most are just cheats or ease of use, but some do add some extra stuff.
Herb Gardens allows seed planting, Combat Randomiser gives enemies random traits, resistances and such to make combat harder, crafter kit adds more crafting recipes, Divine Talents are more talents to choose, Sourcerers Sundries which add a NPC which level your gear, so you can level an item that has traits you desire instead of replacing it. Also one added more customization options for the character looks (more faces, hairstyles, etc).
Those are mostly the ones that add content, but I may have missed something.