I've never seen Soul Eater, but I think it's pretty uniquely designed. It caught my eye as being a little looser and more cartoonish.
Mostly agreed with OP, though I don't think Macross F is that much worse than Geass or Gundam 00. I really like it when characters are unique not just because of an accessory/hair/clothing schtick, but when there's actual variation among facial features and body types. Gurren Lagann does a good job of this in that it retains the animu look, but Simon has different eyes from Rossiu, and Viral is more wiry than either Simon or Kamina, etc. Pic highly unrelated.