No offense, but it may well be intentional that there's no "single-choice poll" option.
Personally, I think this would be an actively bad idea. WOTC would be wasting time packaging material we already have, and they'd be misleading everyone by suggesting that this material is sufficient for any kind of widespread playtesting. Intrepid ENWorlders scrapping together materials for their own makeshift playtests are one thing; WOTC actually publishing that same material as a "preview" would be bad news.