Ok this is starting to annoying me...
first we had
mains crying for buffs with 53%+ winrates in every elo?
asking for compensation for nerfs to a 
now we have
mains asking for buffs at 50% winrate in every elo?
PEOPLE
50% IN EVERY ELO IS BY DEFINITION BALANCED above 50% in every elo is too strong..
below 50% in every elo is (in general) too weak...
if you want to ask for a buff to a champ that has a sub 45% winrate in multiple elos... by all means.. go ahead. even if i hate the champ i can really argue with that data if its from a valid source
if your champ is 50% for every elo except plat + then your still mostly balanced. unfortunate as it may be.. not every champ can be balanced to be viable in higher elo without making them absurdly broken in lower elos because the skill it takes to beat them would be absurdly higher than the skill it takes to play them. other champs just flat out don't work at higher elo because of their kit.
its not like the pro's get more than 20-30 options to choose from at any given patch anyways, that's just life..
if your champ is only decent in pro play, then go ahead ask for buffs. because god knows if your champ has to be in the hands of the top 2% of players to even be usable... it seriously needs help.
but let me repeat.. IF YOUR CHAMP HAS A 50% + WINRATE IN EVERY ELO
IT DOES NOT NEED BUFFS
SHUT UP ABOUT IT ALREADY
were are already at the point where even the weakest champs would need almost hotfix nerfs if they existed in their current state 4 seasons ago, because they would be hilariously OP compared to what was out there back then, due to damage creep reaching level of absolute absurdity.
WE DON'T NEED TO BE BUFFING CHAMPIONS let alone ones that are already balanced or even worse.. already OP.
had a 9% differential between bronze and diamond
even now it is nearly 6-7%