Make Malphite's (W) a radius around him.
While the "buff" for Malphite was rather comparable in terms of damage when 5/11 was released, he did lose a considerable amount of aoe for his auto attacks. While this is being addressed somewhat by increasing it's radius in 5.12, it's still a radius around what he's targeting. I find while jungling with him that I don't hit the small monsters if I haven't corralled them perfectly, which is often a challenge especially with the small ranged monsters. This effectively slows down my jungle clear considerably.
By changing his (W) to a radius surrounding him when he attacks, it would allow him to hit all enemies within a small vicinity around him, which would help him in jungle clear and in team fights.