Nah its not too bad, the hitboxes are already slightly bigger than the model you see, this actually mostly conforms to engineers base model and is 96% within the hitboxes (the shoulders poke out very slightly but its not really an issue)

buff guy speaks out,
hey i have one question about working out, ya see im like 140 LBS and i wana be 124 and composed of 100% essenstial ♥♥♥♥,
and 24% muscle.

It's definitely acceptable. After all, it's Engi and not Scout.

引用自 Barno：

Nah its not too bad, the hitboxes are already slightly bigger than the model you see, this actually mostly conforms to engineers base model and is 96% within the hitboxes (the shoulders poke out very slightly but its not really an issue)

that just tells you how massive and wacky tf hitboxes are



and i think this cosmetic will be fine for melee too

There are other bulky cosmetics like jackets and backpacks that extend beyond the hitbox, too, so I guess it would be fine.
In TF2 the best place to aim for is the "midline", the center of the character's body at waist height, anyway (unless you're a Sniper going for head hitbox).