1. Change the story quests that provide a choice of items so they each provide a selection chest containing the same items, this way running them using the auto quest function with alts will not be detrimental to your obtained rewards.
2. Newer classes have it so when we get lower tier skill books, there's only one type for each rarity grade, while older classes still give us ones for each skill, which creates a lot of inventory clutter when farming using them. Change it so they all provide only one type for each lower tier.