Malphite rework?
Zoned out in class. Kit popped into head. Lets get started.
Passive: Stone Armor While Malphite is shielded, his armor increased by 50%, and takes 25% less damage from auto attacks. While malphite has no shield, he has a 15% movement speed bonus
Q: Cracked shard Malphite throws out a stone piece. If the stone piece hits, it slows the enemy for 2 seconds. This ability disappears after a certain distance (similar to how you can run out of illaoi's e). This ability can be charged up for 2 seconds, the longer the chargeup, the longer the ability can travel and the longer it slows, up to a 4 second slow. Enemies hit in a small circle around malphite as he charges this ability get knocked back slightly, from .25 seconds to 1 second, depending on the length this ability was charged.
W: Crippling strikes Malphites auto attacks slow for the next few seconds.
E: Ground Shatter After .75 seconds, malphite slams down on the ground, dealing damage based on AP and Armor, slowing any enemy's attack speed caught in the radius, and leaves behind cracked ground. If malphite autos someone while Crippling strikes are active while the enemy and malphite are on cracked ground, the ground will erupt, rooting all enemies in the radius for 1 second. After this occurs, Crippling strikes will end, and be placed on cooldown.
Furthermore, if Malphite stays on cracked ground for 5 seconds, he can click on the ground to absorb the cracked ground, granting him a 10% max HP shield, while removing the cracked ground. This can be done during combat, however, if he obtains a shield while in combat, stone armor's shield bonus is not applied.
R: Unstoppable force. Unchanged. Malphite selects an area and slams down, knocking up anyone he hits.
How does this sound? It retains the old malphite feel, gives him some much needed love, grants him a rework that isn't just about extra damage but rather gives him tankiness and sustain, and enhances the idea of a flat tank, while still making him quite immobile.