I agree with user Volti below; the new Transition Table is certainly a downgrade from the old Matrix grid view, which was much more convenient at a glance. Here, with the new "Table" UI, you have to select each scene individually from a drop-down menu, and then do the same with the scene you are trying to transition TO. Some may call this a "cleaner, less cluttered look", but I call it a step backwards.
It would be awesome if the "Matrix" button was more than just a preview, and was actually interactive; available as the classic Transition Matrix option that users could opt for over the new layout somehow.
That said the last version of Matrix was certainly clunky and aging, and the Matrix button in Table is pretty polished by comparison, even without interactivity.