>>4402675>If they just wanted to make a kickass costume, they could just cosplay outright without bastardizing creature characters with their shitty toony look.The toony look isn't always some 'Let's make this KAWAII!!' thing, although the picture you provide looks to be just that.
Bigger eyes allow them to have a better range of vision so they don't run into people, walls or anything else. Realistic looks limit the person in the suit a shit ton because you only get a fraction of your normal visual abilities. You usually end up with tunnel vision and that's why a lot of fursuiters have a handler to guide them around safely.
Some build in a camera system to help them see, but that is an expensive route to take and a camera cannot always be hidden so it doesn't ruin the costume.