As far as I'm aware, all base druid forms were updated in 7.0. Are new Worgen druid forms then warranted in 8.2.5? No, I wouldn't say so. That said, ever since druid was announced as a class for Worgen at Blizzcon during Cataclysm reveal, many people wanted Worgen "cat" form to be a wolf instead. But many of the current feline inspired ability names wouldn't make much sense then, and Blizzard aren't going to give separate abilities to Worgen druids.
Edit:
Here's a comparison of post-legion and pre-legion cat form update for Worgen