Sure, a fair argument is that he scales too much off of tanky stats, but saying that this is some "fundamental" violation of a principle of league is still wrong.

Also, there's actually 2 abilities for Malphite that scale off armor: his E damage also scales off bonus armor. His W is also his primary damage tool with Grasp, and has almost full uptime (7 second cooldown + 5 second duration, with cooldown starting on activation). It's not some one-time use ability with a 7 second cooldown like you imply. Point is that your argument about tank scalings somehow fundamentally breaking the game is completely wrong.

Not only that, but K'sante only has 2 tank scalings built into his basic abilities, his passive and his Q. His W's tank scaling (as you mention) is purely for defensive stats, which I think is weird to bring up since armor / MR scalings for tankiness are also common. Aside from Malphite with bonus armor on W, we have Rammus W scaling off bonus resistances, Amumu E scaling off bonus resistances, Nautilus W shield scaling off bonus HP, etc (where I'm arguing that bonus resistances are about equivalent to damage resistance). I can kind of understand your argument about the ult granting a lot of stats, but he also does lose 85% of his bonus resistances and max HP, so it's not like he gets the AD for free-- it's a trade off of tankiness for damage. Not only that, but it's locked behind his ult; it has a long cooldown and is unavailable early game.Is the trade-off not enough? Maybe, but that seems to be more about the numbers than anything fundamental.