Nerf Now!! 1387
The current, new meta seen to hold early push and heavily punish botched teamfights.
You could be winning 22 to 3 with 6 enemy towers down and a single botched engagement at their tier 3 towers and suddenly, the enemy catch up and the game is back to ground zero. Another bad teamfight and you lose.
What this means? People will pick heroes who scale well into late game and avoid agression until they can deal a hard, single finishing blow.
However, losing a teamfight is so punishing now I expect the ugly head of split-pushing to pop again.