I don't see people in that thread being hostile - only honest. And honestly, that redesign is really bad. There's really nothing positive to say about it and although the old adage goes "don't say anything if you have nothing positive to say" I'm glad people here don't bide by it and provide useful critique instead.
I agree, even as a submitter I'd rather people would comment -- even if it's just to criticise -- than if everybody is too polite to say anything. This way, I think everybody can profit from it.