User blog comment:Care Level/On Anti-Snowball, 2v1, Melee v. Ranged, and player satisfaction./@comment-12443575-20140709075839

The idea is good, but it's incredibly hard to balance. And in the end of the day, you want to get that reward for winning your lane. Also, you don't want  to have strong early game. The thing is, if you make an item to compensate bad matchups, people will buy it for good matchups to snowball.