Agreed.
Along with adding Pestilence, Glade and Sleeping Dragon Spawns to Fel some way.
This would be awsome too, however I think Every spawn & peerless should be available in both Tram & Fel, and the reward (or droprates) should be tweaked for the fel side, like give the fel items more durability, Or 100% droprate in fel, nothing game-breaking, just a slightly better lifespan or something would suffice imo.
as for the conjurer's trinket I Think they should add slayer Talisman arties (like the conjurers trinket) to T-maps and take the place of the Mana phasing orbs (lvl 7 t-maps only), Mana phase orbs still obtainable from lower lvl maps, talismans would have a diff name, and would be a Random Super Slayer, instead of only undead.
the Cloak of augmentation (or something similar) should be added to some type of point reward system like the shame crystal points. maybe have a vendor somewhere, that takes say 500 points to purchase an Equipable item. Just an idea, to keep these dungeons active event beyond the Whetstone. (multiple things these points could be spent on, would give better reason to farm for it).
Maybe a vendor for Each different dungeon (With exclusive rewards depending on which dungeon points it accepts as currency)