No, Ishida's always been weak at legs. Go to danbooru and check his cheesecake pics. Some they're nice, but if he draws more than a cowboy shot (knees up), they'll inevitably taper to sticks.
In the manga he usually just prefers to just not draw below the waist unless it's for a wide shot where the distance obscures the details.
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Mashu gets her to cover her midriff. :V