CS is too Over rated for an S Score

So i player one day with Anivia and get score of 10/0/15 - i pushed turrets, help my team several times, saved at least 2-3 kills there, ganked alot in other lanes, i was really active but why A+ ??? probubly happend to alot of ppl here so why is that? after alot of thinking and reading i discoverd things happenning in games that i just dont like:

1. A player stuck in his lane doing CS (usually Top of ADC) and steal some killes here and there... those kind of player usually get us loose but when we win they get the "S", why? cos they have alot of CS!
2. while i bussy to help other lanes when they get in truble i loose some of my CS but get a kill or assyst and get no "s"
3. while allways helping Dragon or help get tower down i still dont get the S so, basicly i think that CS is too Over rated, why? think about it, when a player dont help (a good player) that have kills (on the expence of his team) and just dont care about team work and just stay in his lane, ruin all the fun from the game, ruin your game, and in the end get an S bacause he got alot of CS and he ddnt die like you (because he did not come to team fights) this is a lil bit unfair, something in the system caculation is wrong! a best player is a player that look after his team, push objectives, know when to back off and when to get in... if you see a score of 20/2/3 with 250CS what do u think? its a grate score? well, i see 2 things:
4. its an amazing player
5. its an idiot player (probubly Riven) that did not help his team all over the game and just pop out after the team fight was over and get the kills (alot of time loose the game but its his luck they won it) i think CS need to be removed from the caculation because its not telling really how good u r, its a flat data thats it. CS is really importent no doubt but not for the score that suppose to reflect your actions in the game.

I hope Riot will change thair way of caculation

Eladbyg