I was just thinking the same and wrote up a proposal, let me know what you think.
This is in addition to VFX updates of course.
Granite Shield (P)
"Malphite now glows when his Shield regenerates. This should make it more clear when Malphite has access to his Shield as a combat resource"
"Malphite’s size now scales with his Armor! Become a literal mountain like you always dreamed of"
"Size scaling has been refactored to account for the massive Armor values Malphite can get through his W. His growth spurt now caps out at ~700 Armor"
Seismic Shard (Q)
Movement speed steal changed from 14/17/20/23/26% to 15/20/25/30/35%"
Speed duration reduced from 4 seconds to 3 seconds
"Malphite no longer summons his earthen saw blade from behind himself, and instead casts it from his right arm. This also increases how fast the missile reaches its target"
"Targets affected by Q are covered in a molten rock effect for the duration of the slow"
"Other miscellaneous values adjusted. Too many to mention in detail here, but overall this Ability should have more weight to it and ‘feel’ like a rock monster hurling a chunk of Summoner’s Rift at his opponents"
"Q now checks if "stealing" move speed would result in a faster Malphite, and uses that value in the rare cases when it does"
"spawns closer to its target on cast"
Thunderclap (W)
Renamed from Brutal Strikes
mana cost increased from 25 to 35
Armor increased from 10% to 10/15/20/25/30%
Initial hit AP ratio lowered from 40% to 20%
Initial hit armor ratio lowered from 20% to 15%
"On cast, Malphite resets his auto attack and deals 20/35/50/65/80 bonus Physical damage, scaling with 1.5 armor and 0.20 AP"
"In addition, Malphite’s auto attacks create ‘aftershocks’ for the next 5 seconds. These are frontal cleaves (think Titanic Hydra) that deal 10/20/30/40/50 physical damage to all enemies in range of the cone, scaling with 0.1 armor and 0.2 AP"
R - Unstoppable Force
"Malphite’s Base Skin now features an impact crater. IT CAN’T BE STOPPED!"
For VFX updates I popped open photoshop and came up with some concepts, let me know what you think.
https://3.bp.blogspot.com/-flGYyS5tkF0/XNtJIJneDGI/AAAAAAABS_8/Dzx17u-0-A8gk_nwRlF5p6nEATIJG6XzwCLcBGAs/s1600/malphrv.png
https://3.bp.blogspot.com/-BGo9UzbUFqk/XNtJJG_fGcI/AAAAAAABTAE/BdJLK8F2aPAb-wXMjjw0PwNdEFYX8UH1wCLcBGAs/s1600/malphwv.png
https://4.bp.blogspot.com/-JFkbNUJVYsw/XNtJFSSL3qI/AAAAAAABS_o/g01Jvft04LgrGk5y0KRaKUjPdikPQ83WwCLcBGAs/s640/malphev.png
https://4.bp.blogspot.com/-Vrvz7asUylg/XNtJF5hR7bI/AAAAAAABS_s/YInCeKkOHFMMzb1vuwcOlaCGPlZzK4htACLcBGAs/s640/malphpv.png
Too flashy? I feel like it's just too flashy. May try again later.