Half the playerbase never joined Overwatch because it looked like playing fps, such as playing widow and soldier, and doing damage in a generic fps way was fun.
They joined because you could play as a cool cyborg ninja with a long sword invoking dragons out of his soul and slicing his enemies apart. Or an angelic healer gracefully flying through the air, helping teammates and glowing with the power of resurrecting fallen allies in a pinch. Or the stalwart humongous defender of your teammates who rams into people, swings his giant rocket hammer around and knocks em all down.
To say Overwatch is an fps at it’s core is a misnomer and doesn’t do justice to what the game is actually about at it’s core. There’s so much character fantasy rpg elements translated through abilities that it’s a crime they’re about to homogenize the entire game into a more plain shooter.
It’s pure irony that the one character who does not specialize in shooting things is the character who is the most popular in the entire game. Characters made Overwatch popular, not the first person shooter design.