Sonjia was the only one to design an outfit that would be flattering to women in a wide range of shapes and sizes. The flowing, but not tent-like, style of the grey top would look good on both busty and less boobily endowed women, and the whole look would be lovely on plus size women as well as those who are model slim. It was trendy enough for younger women, but the length of skirt would work well for more mature women who don't want to rock a short skirt and would be appropriate for many workplaces. Also, someone under 5 foot 11 could wear it well. Though the confessionals made it seem like she had no idea what was doing, she seemed to be the only one who understood the brief - or had any familiarity with what QVC actually sells and which demographics it targets. She was thoughtful, and she deserved the win.
In contrast, Michelle's looks were only appropriate for extras in American Horror Story: Freak Show. I really wanted the judges to ask her who her woman was, because those were just nuts.
And Dimitri - who over a size 2 can wear a neoprene suit with a bare midriff? And, again, where would she wear it, other than to Comic-Con, because it looked very sci-fi? When the judges said the jacket could be worn with jeans - only if they were super high-waisted or the woman felt comfortable wearing a crop top. You're still the ProjectRunwayDeisgnerILF, but come on, dude.
This whole "I don't understand sportswear" attitude the designers have baffles me, both because there's like 500 people on earth who wear gowns/couture on a regular basis, and because they're wearing normal clothes while they work. Uh, maybe you ought to think about why you liked those jeans/t-shirts/sweaters that are on your back and figure out how to make some of your own.