Indeed it would.
They should make some tanks, supports, carries and so on. Like 3-4 champs for each class, alot of work maybe, but so extreamly awsome.
No, just Kha'zix. If we make this project any bigger, it will never get finished in a reasonable time.
Ex. Dragon pack, Bug mods.
EDIT: The next evolution we're thinking of is a Sensory Evolution. It tells you if victims are near you, making him easier to find players on large maps. We're using Army Unit's Canyon map(edited) for Kha'zix beta testing to make Kha'zix as mobile and lethal as possible - without making him unkillable.