Suggestion to improve the ranking system

Theres already quite a lot of balances to the rank system like its matchmaking and modifiers (ill get to this below), I feel theres still so much that can be done.

For example, only allowing the use of lvl 15 and above Heros in ranked match, although theres counters and stuff idw ppl to keep changing to new heros and still feeding cos they simply dont know how to use em. if ranked is locked for them till they have a lvl 15 then so be it lol lesser feeders in ranked is the whole point right?

They should also deduct or add rank progressions based on your performance in that match (balance in kda and stats out of the lobby avr) its rly unfair to do well yet have a bad team or one dysfunctional kid to lose the same amt they do. So the better players actually get properly rewarded and the bad/ trolling ones go down.

lastly I disagree with some of the modifiers. like what do you mean expected will make me gain lower %? if ur gonna match me up with lower ranked people and then give me a lower points anyways is that not making us lose on the average? (cos realistically with this current bad player base and matchmaking rarely youll get uphill battle perk).

leaver compensation also needs to work properly. times where the guy leaves mid match and I dont get the compensation its just sad. esp one guy starts leaving and then the rest follows on a winnable game. Just ban those who leave.

Many chances to be made. Solo queue is just hell