I honestly feel like this game is down to whomever has the better team wins.
Last season, you could play riven top or something like that get super fed and just 1 v 5 the enemy team and carry, this season I find that getting super fed doesn't matter as much. You can do really really well and if you have 2 feeders you lose. Basically games seem to be decided by team with 1 feeder wins, team with 2 feeders loses.