A couple of suggestions to add to the list of loot available as end rewards. These items are all consumables, all things that characters use frequently, and items that can be tough to afford in quantity for players without capped characters. Currently only wands and mana potions are available as consumable end rewards - I think adding stacks of 5-25 scrolls, potions and other items would be a useful change.
Clearly players would not take these over quality items, but I think many players would prefer useful items like these.
Low-level (add to levels 1-5 loot tables):
10 Cure Light Wounds potions
10 Cure Moderate Wounds potions
5 Cure Blindness potions
5 Remove Curse potions
10 Potions of Aid
5 Potions of Haste
5 Potions of Heroism
10 Lesser Restoration potions
These are useful items for lowbies.
Mid-level (add to 6-10 loot tables):
10 Cure Serious potions
Wand of Cure Critical Wounds, caster level 10 (i.e. heals 4d8+10)
Wand of Haste, caster level 10
10 scrolls of Restoration
5 scrolls of Raise Dead
5 scrolls of Break Enchantment
5 scrolls of Stone to Flesh
10 Potions of Haste, caster level 10
10 Potions of Protection from Elements: (random element), caster level 10
5 Potions of Jump 30
5 Potions of Resist Energy 30: (random element)
5 scrolls of Dimension Door
5 scrolls of Cloudkill
5 scrolls of Firewall
High-level (add to 11-16 loot tables):
25 Cure Serious potions
Wand of Cure Critical, caster level 15
Wand of Recitation, caster level 15
5 scrolls of Resurrection
10 scrolls of Heal
10 scrolls of Greater Heroism
5 scrolls of Greater Restoration
10 scrolls of Mass Cure Serious Wounds
10 scrolls of Mass Cure Critical Wounds (post mod-6)
Anyway, just a suggestion.