I presume you mean the drop-down list options beginning with:

Create a new list

                                and then all of the lists created?

I'm not having any issue with it (although I somewhat agree with you about the new watch page being painful). The scroll bar is visible to me, and functioning correctly.

Have you tried reducing text size for your browser? In Firefox, for instance, it's View -> Zoom -> Zoom out. It might just make the last of your lists appear.