Some first thoughts about the beta:
I installed it earlier today and played with it half an hour.
Old style top menu.
About the duplicate urls menu: There are duplicate urls already - ID 5 and 6 with the demo products for both English and German version. But when I change the URL for the English version it doesn't change for German version also? After that I can see the edited product in preferences/redirects but when I click on it nothing happens and I'm not sure what will happen if I hit delete, will it delete the product or the redirect and will have duplicate again?
Isn't it possible to do it like that: When you add a product, category etc to check if there is existing product with same URL already and inform you to change it in real time, instead those additional menus?
At some point the custom cms module disappeared from the front office and I had to disable and enable it to show again. I don't know if it is a bug.
That's it for now :)