Diminishing return stun in ARAM

I love playing ARAM when I am not in the mood for a full game. But my issue with the game comes from this, with so many champs all on top of each other group stuns become pretty hard to beat and if more than one person has stuns or silences you straight up can't get near the team making melee champs useless if not impossible to win. My suggestion is this, make diminishing returns on all stuns for a champ. For example if you get stunned by veigar for 2.5 seconds then twisted fate stuns you with a gold card for 2 seconds your out of play for 4.5 seconds, But with diminishing return stuns Veigar stuns you for 2.5 seconds and Twisted fate will only hit you for 1 second. Only if you got stunned within the past three seconds. Otherwise it goes back to the full 2 seconds. If someone else stuns you for a normal 2 seconds stun and you got hit twice before then they would only get you for .5 seconds.