I'm aware that the devs are trying to fix the SCORING, so that AFKers don't get to the top 10 slot just by having the game running for eight hours a day, but the game matching needs some fixing up.
Random matching isn't the best-executed game style. Today for example, I played a guy who said "this is my first time playing lol", and naturally he wound up at or near the bottom of the rankings, while I scored about 20 more points than him. I am by no means the best player in the game, but I'm consistently matched with people who are worse than me--it does get me crowns, but it's no fun getting 1st place all the time when I know there are better players out there (it also peeves me that I'm still in the 500-1000 range despite generally getting first place, and those in last place advance about as fast as I do, but w/e, OOO is working on that I guess).
So uh, tl;dr, match us with players of OUR skill level, as opposed to random players, since it puts good players at an unfair advantage, and new/bad ones at a disadvantage.
I'm not gonna go into the lag and glitchiness and other negative sides of the game though, since much of it can't be helped--but at least the matching and scoring should be fixed. :P
Those aside, it'd be nice to fix the collision detection on bombs (often times I'm PUSHED into a trap by someone else's bomb) and decrease the life of powerups (so they disappear faster).