A new feature made its way into the League of Legends client recently that I haven't seen announced anywhere. (Though, to be fair, I didn't look anywhere except the patch notes.) It's a pair of buttons on the game end screen which both take you to a webpage with information about the game you just played.
The game I just played, as Kayle, for example...
There's some really interesting stuff on here. It gives you the normal info like items owned at the end of the game, and the gold totals at the end of the game. But then it goes further and lists barons, dragons, and turret kills. It shows the bans!
IT SHOWS THE NUMBER OF WARDS PLACED!!!
AND THE NUMBER OF WARDS PURCHASED!
(I bought 0. I am terrible. The game as a whole bought 6 pink wards total. We're all terrible.)
Wow, it breaks down the jungle monsters killed by which side of the map they were on. The other team managed to kill a total of 4 monsters in our jungle. I actually placed wards a couple times to try to catch Singed at my golems, but he never went for them despite farming between the turrets.
It also has some graphs showing gold over time, and when various objectives were taken. So I can see that at the 14 minute mark the enemy team made a comeback. Their mid roamed bottom and killed both of my bottom laners and then their ADC killed our jungler and the dragon. We went from being up 4k to being up less than 1k in 2 minutes. It's a shame it doesn't also give a chat log, because I can remember at the time my team was raging at our mid for not indicating that Kat was missing from mid. Things really swung back in our favour at the 22 minute mark, when we aced the enemy team without losing anyone and got dragon.
You can also do a graph comparing individual champion gold totals. So I can see for example that in that 14-16 minute span their mid made 1.4k gold and my mid made 600 gold just obliviously farming away in lane. The graph makes it look like Gangplank was dominating Katerina in lane, but then he lost focus and let her get away to kill people in another lane without accomplishing anything in return.
Or if I look at my lane matchup, I see that I did a bad job. I fell behind in gold for pretty much the whole game. Part of that was two successful ganks from their jungler to zero from mine. (A couple failed ganks as well, and one 2v2 fight that we lost because my jungler wandered off right before the fight started and it ended up being a series of 1v2 fights. Oh well!
On the plus side, that ace for nothing at the 22 minute mark happened because I decided to protect Vayne instead of trying to do damage and managed to intervention her right when Kat jumped on her and then we were able to burst her out. If I'd wandered off to join the big fight happening nearby then Kat kills Vayne in 2 seconds, gets all her resets, and might well be able to wreck our faces.
I definitely feel like I was a weak link on my team, but I wasn't weak enough to cause us to lose. Hurray!