Update 25 Patch 3
Welcome to the Update 25 Patch 3 Release Notes for Dungeons & Dragons Online! These notes were posted on Wednesday, May 6th, 2015.

News and Notes:

Temple of Elemental Evil

    Base XP for both Temple of Elemental Evil Part One and Part Two has been increased. This also increases the XP for all optionals.
    The chance for a rare encounter to appear off of the critical path in Temple of Elemental Evil has been increased by 20%.
    The XP for each of the "Defeat X enemies" Optional objectives have been increased.
    Altars and the Fountain of Wonder in Temple of Elemental Evil Part 2 now drop the Parisol Mushroom instead of the Gilled Mushroom.
    Epic upgradable items from Temple of Elemental Evil now properly use the Epic Octopus Stinkhorn Mushrooms for upgrades instead of the heroic version of the ingredient.

Daily Dice

    New items have been added to the Daily Dice reward table, including:
        +6 to +7 Upgrade Tomes
        +1 Tomes of Fate
        +1 to +2 Upgrade Tomes of Fate
        +2 to +3 Upgrade Tomes of Fate
        New Creature Companions
        Gold Seal Elixirs of Acolyte's Healing - On Use: Immediately heal 180 Hit Points, plus 36 to 72 additional Hit Points every 2 seconds for the next 10 seconds. Cooldown: 15 seconds A small vial, bearing a gold seal, containing an ounce of shimmering liquid. Gold Seal healing elixirs can be used twice as often as regular healing elixirs.
        Long Lasting Potions of Melee Power, Ranged Power, Spell Power, Physical Resistance Rating, and Magical Resistance Rating. All of these potions provide +10 to their respective benefit, last for one hour, and persist through death.

There's a lot of different loot that drops in a lot of different places in TOEE. The distribution is a bit different than a lot of other dungeons in DDO.

For the upgradeable Elemental Weapons, those are found in each dungeon's End Chest, in Random Encounter chests, and the Arc Reward List (when you complete both dungeons). If you've been playing TOEE, you've probably seen a lot of these so far. The drop rate for each kind of weapon is roughly equal. If you're looking for one of a particular element, you may want to search Random Encounters in the particular Node for that element.

For the upgradeable Elemental Armors, you'll want to search Random Encounters in the Elemental Nodes of Part 2.

For the Mythic Named Weapons, they can be found in Random Encounters within the Temple (but not inside the Nodes, I believe) as well as the end chests for either part - However, your odds are much higher on Random Encounter chests than the end chests.

The Mushroom Cap is the only item unique to the End Chest of Part 2.

(Additionally, +6 to +7 Upgrade Tomes can only be found in the End Chests for either Part 1 or Part 2).

With this patch, we've raised the rate at which Rare Encounters (i.e. those with chests) show up in the Temple. You should be seeing chests more often, and thus have more chances at pulling that loot from the chests where they're most likely to drop.

So that's what the whole "power" revamp was all about in the end really.

The Return on Investment simply isn't there