Just from the dragon alone there are multipe usage thats been truly left out by the Skyrim Dev team:
Dragon drops:
Scales , Bones , Heart , Blood , Nail , Teeth
Usage:
Scales, Bones, Nail, Teeth - Weaponsmithing, Armorsmithing
Blood - Alchemy
Heart - Food
Dragonshout + GreaterSoulgem = Transformation Dragonsoul to Soulgem to create a Dragon Soulgem
Enchanting with Dragon Soulgem to give +dmg% to dragons
Usage:
Scales, Bones, Nail, Teeth - Weaponsmithing, Armorsmithing
Blood - Alchemy
Heart - Food
Dragonshout + GreaterSoulgem = Transformation Dragonsoul to Soulgem to create a Dragon Soulgem
Enchanting with Dragon Soulgem to give +dmg% to dragons
Scroll crafting, using the spells you know to create scroll's for example.
There is a wide range of stuff thats really unused, arrowcrafting (fletching) comes to mind.
Once i have built my new pc ill begin to mod the game since i need something to do during the evening's..
If possible i would also remove the pausing of potting and make a quickslot gui for spells and pots that way one could later dig into somekind of netcode for a 5 way coop mode.
