Dead content NEEDS to be revisited. Constantly.
These are unused graphical, audio, and design assets that sit there collecting dust. Except it doesn't. These quests are financial liabilities. They take up space, cause problems, and generate ZERO revenue. Therefore, it either needs to be deleted altogether to save money or revamped.
If Turbine were REALLY smart, they would kill multiple birds with one stone and have the Three Barrel Cove chests drop:
Gear with Cannith Craftable.
Cannith Craftable Dex/Int/Con/Wis/Cha Damage + Attack modifier weapons.
Cannith +10 Enhancement Shards.
Flexible Healing Amp Shards.
DDO is a wasteland of dead content that nobody runs, with financial liabilities everywhere.
More importantly, old content is faster and cheaper to fix than it is to make new content. Reusing old assets saves Turbine time and money, which they COULD theoretically use to FIX BUGS.