Does anyone really respond well to 8x200m in the 85% range? It is my supposition that some people simply adapt to that stress a little better than others.
To me at least, speed is just that speed. Once should always be under control, but at 95%+ of max. for distance less than 60m, usually more like 30m.
The way that you outline the 80m session, it looks more like running a broken 240 or 320. In that way, yes, you can keep good technique if the focus is there. With distances that short, the breaks should be very sort IMO.