I think it's more of a feeling stuff. Roadhog is more on the likes of cartoonish and dangerous. People can have fun with a character that is fat and dangerous.

It's the same with Pudge from Dota2. He's fat and he has a backstory of being fat and eating the enemies.

Now this one from Concord. It seems she's just like an overweight lady you see at Wallmart. Also she seems like an autoinsert and plain boring. A character can be fat and fun or fat and boring. The one from Concord seems fat and boring. It seems like a character that will get tired of running for for 3 minutes and lie on the ground to rest.

Doing fat is hard because people will want to make jokes so I guess the first rule of fat is that is has to be a male. Because it's hard to make fun of female characters.

Also the Roadhog has some cool features to booth. This one has nothing. Even her eye protectors are plain white with no particular distinction from any Karen you might find elsewhere. They could go the route of giving her a heavy weapon so it balances on her being fat and people could think that she's fat but shes strong but they gave her a common machine gun. Overwatch had a fat and good character that was cool. She used a heavy gun and it was really cool. I mean, there are two ways to treat a fat character. If it's male it can be cool or cartoonish, if its female it has to be cool. This one is not cool.

I mean, there are a lot of small decisions in design that made this one suck.