Generally in premades, I don't see the score system as it is as a problem. We all know how our teammates contributed outside of their score. That one guy defending points like no one's business, we apreciate them so much.
The problem really lies in Solo Q, same as it does in SR. People will stare blindly at the K/D/A as they now will do at the personal scores: "Look at my score, I am the best!"
No you aren't, you keep trying to capture points as Eve, that we cannot possibly defend, you get points for neutralizing it, also possibly capping it, but we are facing a 4v5 when it comes to holding our other capped points.
Eve then goes on a rage, how he did the best in that game and we all sucked, while we worked our asses off, trying to defend the points we had, trying to make up for all the 4v5 situations we faced, because basically Eve was running around everywhere.
In good premades, it doesn't bother me at all, it's the Solo Queue mentallity that I cannot stand.