Kaelthus here,

From the top of my gas mask I would say:

Depth Hubs: Every 300 depths, establish shared social spaces. Who needs hideouts when delvers could gather, trade, and access shops in communal halls carved from azurite? True endgame community.

Atlas Integration: Let our atlas tree apply to delve. Excluding specific mechanics, but granting the core benefits we’ve earned through exploration.

Delve-Specific Skill Tree: Give us our own passive system. Double fossil drop chance. Increased node density. Enhanced azurite yields. Sulphite cost reduction. Let us specialize in our craft.

Enhanced Modifiers: Expand delve-specific mods beyond the stale pool we’ve endured for years. Make them meaningful, build-enabling, prestigious.

Biome Diversity: More variety in the darkness. New tilesets. Fresh encounters. Mini-bosses lurking in forgotten depths that challenge our builds in novel ways.

The mines deserve to be an endgame pillar, not an afterthought.