Doesn't Malphite Seem a bit small/unintimidating to you?
I feel like Malphite could use some loving on the skin/texture update side of things. While the champion himself is very fun, I feel like the enormous rock golem looks kind of short and sad looking when compared to champions like Nautilus and more recently, Sion. His newest skin (happily nicknamed pacific rim malphite) looks fine, but the older skins are definitely starting to look... well... old....
I don't feel like his visuals deserve a complete rework, but maybe something similar to what they did to Renekton? The new splash art for Malphite really looks like how Malph should feel (like a titanic rock monster, so massive and terrifying that his strongest move is literally called: Unstoppable Force)
TLDR of this: Make Malphite bigger, preferably around Nautilus's size, as it seems like it would be more fitting to the champion. And sharpen his skins a bit, to make them feel more coherently like a threatening rock monster.