User blog comment:Thomasfan502/Season 8 Discussion Blog/@comment-5875378-20181001173405/@comment-31892545-20181001192858

I mean to be fair, they did keep the minor fairies’ Winx in S7 and Roxy’s Believix fairly untouched, just brightened. I don’t think they’re afraid to bring back more revealing outfits, but if they do make a change for the Winx themselves in that aspect it’s because they’ve been maturing over the years as the clothing has become more modest. They’re in their twenties now, so you definitely won’t see them caught dead in what they were wearing at 16. Same for anyone, really.

As for the redesign, this is just a concept. We don’t actually know what they plan to do in terms of redesign. Maybe this is just an upgrade to Sirenix like Charmix was to Winx. If you’re worried about wing size/detail, remember that special function dolls or economy lines have the smaller wings with less detail (see Sirenix Color Magic). Even though I believe Sirenix would be awesome with these wings, I doubt that they’ll be this size in the series.