I think a large part of it is the lightning. Tekken's lighting, where existent, is terrible. DOA's, in contrast, is pretty standard and non-distracting.
Well to each their own XD if lili was ever featured in tekken like that, as much as I love her i probably wouldn't use her unless they overhauled her look, it kind of looks like they just ported her out of tekken and didn't add any shaders or shadow at all to her model