I get that Adobe is always trying to improve their products, thank you very much, but the recent prerelease effort is a bust. None of the proposed improvements seems to add or enhance the most recent updates.
Most recently I attempted to edit a LR image in PS, but it was the prerelease version that opens as a default rather than my incumbent version that has all of my settings and image library. Great heads up Adobe. Anyway, this was the last straw for me, and I had to uninstall the prerelease version of PS so that my default version worked correctly.
Still think that LR and PS is #1 in image editing, but this prerelease effort was extremely disappointing.