Perma shelved my DRK: No role, no idenity, no lore, no worthwhile skills, no fun

[Reynhart]

Making them readily accessible to everyone is better business design overall.

Making all of them close to breaindead is, IMO, a bad move because your hardcore players don't have a class that fit their need anymore.
It's the same move as replacing Savage by a few more expert dungeons.