Would love to see some more specific stats.
We have these roles of Tank, Assassin, Support, Marksman, Fighter and Mage but we get very generic stats. Could we have more sections that highlight how good you were doing your job?
Damage Mitigated (Armour/MR/Shields/Damage Reduction, etc)
Hard CC (Total and Average while in combat)
Slow Duration (Total and Average while in combat)
Highest Burst (Damage to a single target over a 1-2 second period)
Armour/MR Penetration (The amount of extra damage done due to your penetration)
Shielding Done (total absorbed, not the raw shields)
(Can't think of much here)
(Same, they are well covered as is)
A lot of this overlaps, and a good few already exist. But the point is you could look as role-specific stats and get a better idea of how you did in that role. But at the same time, you could see Tank stats for a Nami or Support stats for a Jinx, just so you get all the stats available.