Yup, the touch and feel of the Modern UI in this 9926 Build is gone. This build is currently a very desktop-centric.
Regrettably,I installed it on my Vivotab Smart tablet, now really miss the Modern UI of Windows 8.1. I am a rabid user of the Modern IE browser, now that it is gone, have to browse using the desktop IE which sucks compared to Chrome or Firefox browsers. Missing my very personally unique Start Screen and all my favorite pinned websites are now dead and useless. Here's hoping the constant build updates will iterate towards a more touch-centric focus. Those old school refused-to-change stubborn desktop users are holding court with MS at the moment. As this is a preview/beta build, I am just hoping for the best of both worlds version will progressively materialized.