I agree, there is so much that KI could do with GH in the item/housing/mount/etc arena it does seem quite under tapped. I know there is the Dragon Fjord and Watchtower Hall houses, but the items associated with GH are limited compared to other worlds.
I want a Goblin-Imp Coaster a la Spiderman! No steering column or cross brace ... just a rocket-fired imp under each foot like roller skates ... jumping causes the splits, flying upside down, twisting your legs in a knot, or spiralling out of control, but all of it in a straight line ... ;)
Bring back Chicken-fighting!!! Ride on the shoulders of a Galloping Grendel!
And don't forget the "Been Her" chariot ... a rickshaw pulled by bridled Dark Sprites that power slides around corners ... but its a family game ... (*sigh) prolly gonna haf ta leave out the buggy whips ... ;)