Just idea :)

First sorry for bad English. Second i have an idea. I think is better to make a 5 different "streams" of divisions. 1 jungle, 1 mid, 1 top, 1 adc, 1 supp. And every time someone play as jungle to earn LP in jungle tier, or when someone play mid to earn LP in mid tier. In this way is more likely ppl to have even more good expirience in game. Because its cool to know there is a Plat mid in your team, but the same plat is not plat, but silver tier ADC. It's easy to find members for your team like yes he is plat mid i need mid i take him. in this way u will get info how much ppl play as mid or top or adc and u can use this info to make Queue more optimised. there are more positive things coming from this. Because yes u have ELO for mid and ELO for adc and when u are silver ELO adc u go match with silver ELO ppl in ADC rule and u can actualy to become better adc in time without taking flame in full plat team and ppl saying u are boosted or tard or something else. The game will become more joyeable. so machmaking will become beter because when u pick lane in draft the game is searching in enemy team to have close to your skills in position u choose instead to look for full team ELO to be close to enemy full team ELO. that is how u dodge the posibility to have 2000 elo vs 2000 elo, but in 1 team u have silver mid vs dia mid and in top is dia top vs silver top. and the game is not interesting at all because 1 of them will snowball anyway and the missmatch is big. with this system we can have 2000 elo vs 2000 elo, but the diference in single ppl elo will be in same lane so the game is good. less flames in game, more fun, more interesting. And more and more and more all good thinks coming from that.