Did they make some changes on the support grade system

I just got an S from this game: http://matchhistory.euw.leagueoflegends.com/en/#match-details/EUW1/3067586015/202811705?tab=overview

The game started pretty bad for us. Our suicided 2 times in the early game. It was until his 3th dead it wasn't his fault from dieing in that play. As a support main I was used to it so I just played out the game towards the point I had the items to prevent the Jhin from dieing.

After the game the Jhin had a bigger kill particaption and offcourse the good support i was building full support items only I didn't top the damage charts. What I did good however was controlling vision and that's actually the only visible stat I see that can proof I did a good job their.

So did they finally implement warding into the system or is it just because I have those 3 kills and least deads.

Only recieved a S beside me.