Should have been this, with a black collar and cuffs. Done. Sold.
Or this, but my personal preference for black pinstripes and a black collar means I'd tweak it slightly.
Or the Argentina kit, bodged with red'n'white stripes as above. This with thin black pinstripes between the red and white would have been bought, by me at least, immediately. If not sooner. If this is what they'd've released, I'd've had the afternoon off work so that I could drive back from Chezzy to Bramall Lane to stride into the club shop and forcefully purchase about 15 of them.
(All credit to Barney, dannysufc_ and Blade95 for the mock-ups. Maybe the club or adidas should employ them for the '17-'18 kit design...)