Now I fully expect to be labelled as someone wanting to make KoW into a new version of Warhammer, but I think that there is one easy initiative that would increase the appeal of KoW to a wider audience.
Introduce Race Specific Magic Items and Spells.
This doesn't mean added pages to each list but rather give certain/all races an additional couple of unique Magic Items...weapon/artefact/banner.... and a couple of unique spells.
These would reflect the character of the race.
This would not be too onerous nor would it unbalance the game but it would definitely increase the attractiveness to a lot of people.