Forging:
Like with fur crafting (cloaks, hide armor, boots, belts, fur hood), add preset list of iron items to forge, that don't require a template, besides just the gauntlet. Keep option of copying equipment, but make it so low level can gather iron and make things like chain shirt, breastplate, splint mail, whatever, without having to find a template item first. Add iron boots and helms for crafting (maybe with added weight property or such?)

Jewelry forging with bone and ore. Maybe with different innate properties. Bone talismans that give innate protection against negative/whatever. Or keep it to regen, but at lesser rate. Or reduce the regen/vamp from bone so it doesn't get to be too much. Bone jewelry would still be competing with some of the skill rings, so.

Or is jewelry forging coming with the paid smithies? Still.

Mythic Enemies:
They should drop an extra item for how extremely rare they are, and maybe be more difficult. Possible to tack the new boss ai/special power system onto mythicals? Fighting them feels mostly like fighting a Corrupted with more HP.

+Treasure:
It does not compete with stacking +Mining and spamming the forge, farming mobs with random equipment, or even checking the 2 random shops each time they reset. I say this after running around with 6 or 7 +Treasure on my wizard since late pre-epic and until a couple levels ago (Vilitch is level 29 currently), and in later regions with more and better loot containers

Gold Storage:
Would be nice.

Fur:
Add a Hunting talent or something to improve fur/scale/bone/etc yields of creatures in the wild.

Summons, Familiars, Animal Companions:
Give them 1 regen or something.

Bosses:
XP and gold for repeat kills? Could reduce if excessive boss farming becomes a concern.