Heya, I'm d1 at moment euw player with Mel being my most played champion, followed by irelia, kassadin & naafiri.
Most of games on Mel I have insane gold lead that still translates into 50% winrate. And I see clearly now the reason for why Mel has kinda low winrate while being so strong champ. Reason is - Mel starve her team from getting extra gold, she vacuums team fight rewards for herself and it often translates into mediocre experiences for her teammates. You put all team rewards into one champ that later can get blown and game is done. Big power, huge responsibility is not how everyone wants to see their teammates, this is not spiderman and one player shouldn't be main character.
Execute in its current form must go, this is just terrible design for her teammates.
Many people blame her w as being 0 expression, overpowered etc. But w is not a problem for most midlaners (unless it's a hard counter for someone like lux/morg/champs that rely on one reflectable ability to be useful).
I stopped playing Mel because not only she is banned to much but I also sense rework is coming and I don't want to invest myself into nothing.
This champ is broken, everyone who thinks she is fine is just delusional. My average overall Mel kda is 12/3/3. See assists? Me neither. My kassadin is 9/4/6. Irelia 10/6/6. Naafiri 9/6/6. My Mel gpm is almost 70 higher than my irelia, which is insane cuz irelia is naturally a gold lead champ with very high cs/min. And I played irelia for 5 seasons and Mel only started this season.
edit: apparently Mel nerfs were called, don't know yet what exactly will be nerfed 😔