Originally Posted by Melancholy Exile
he's a being that has broken away from the traditional mould. He's different; he's unique; he's a type of creature and personality we had no idea existed in the Void before his creation.
I could not disagree with you more. Kha'Zix has absolutely no personality. He is not a unique being that shows us a different side of the void, but rather the most simplistic element of it. He is a hungry monster, and that is all there is to him. He came here to eat, and he ate and ate until he found a meal he couldn't eat, so now his goal in life is to eat it.
With Cho'Gath we know that while he feasts he is also intelligent and spiteful. He has a hatred for mankind and is a part of a larger doomsday that might be just around the corner.
Kog'Maw is very childish in nature. Because he doesn't understand how to interact with the world, he just devours, almost like the child who breaks things for attention. Kog'Maw truly shows us a different side of the void, as he is not an inherently evil creature (right now).
These are all just complaints about how boring his lore is, but it also has a lot of holes in it. "Kha'Zix infiltrated Valoran"... what!? Its pretty widely accepted that the Void opening to Valoran will be an end times scenario, but Kha'Zix just gets in? no explanation? It also doesn't make any sense that he would join the League of Legends, where he will never be able to really devour anything.
In response to your question about what Riot could have done to make Kha'Zix more 'exciting', I see two easy options they could have taken.
1) Make him a real individual. Tell us more about his personality. Does he have a reason he wants to become the strongest? Was there something about the Void he disagreed with that made him want to leave there? is there ANYTHING about him other than "must eat strong food"?
2) If he is just a mindless drone, I think that's OK, but then explain more about his hive structure. What is the place of Kha'Zix's race in the Void? what does a single mindless drone coming here mean? Is he part of some ant-colony type hierarchy, and if so what other creatures are in his clan that the people of Valoran need to worry about?
Anything really to give him some character or individuality, because right now he is probably the most boring champion (lore-wise) in the league.