Just tried the new Beta UI and found some areas that seem much worse.
Product Details - Show stopper for me I like to just show the Short description (tabs) for example with this new way it is bad only shows 3 lines of the short description or 3 lines for Description the old way was much better)
No longer has tabs to drill down to relevant area so it is not very usable it tries to show every thing (Short description, Description, Meta Tag and Availability settings) in one column the viewable/usable area for Short description and description is small with no way to expand it + the spacing gaps between areas are large very bad for small screen resolutions.
Favourites Bar - Gone
No longer available requires more effort to Post and Get data using bridge connection :( or add and use common items
Will the final version have Option to use the old UI look as this seems to show to much white space and uses to much of the limited width for menus etc... please bring back the top ribbon we need the width for data not bling.
Just my first impressions using a laptop with 2160x1440 resolution