Post-Game item stats
We all know of the post game stats like we know the back of our hands, so we know how much PTA is doing or how many players we tilted with our dark harvest bard pick, but what we don't see is how much  saved our ad carry from and how much gold you earned from hitting all those crows with fiddlesticks support.
Granted we do get to see these stats in game but unless the entire community develops photographic memory of their item's stats right before the nexus is destroyed, we wont get to analyze which item was underperforming and which item was carrying the team to victory with its synergy. Alongside the rune page should be a page with stats on your item buys, OR just make the stats available as a scroll over ui from the default post game screen. This addition will mostly benefit the support mains seeing as we have alot of said items under our disposal, but we all know games would benefit when the supports can see their value in such a way. Upvote this so hopefully we get some recognition from one of the rioters.