For me, Monologue, Embracer and the Waldorf Suite (v1.2.2?) are still working , but yes, I too will miss good ol’ A1 if it is really gone for good. (Also, I no longer see the old Plugsound VSTis). They are still there in the menus, but simply don’t launch.
Did you try trashing, not only the Vst2xBlacklist Cubase.xml, but also Vst2xPluginsCubase.xml and VstPlugInfo.xml?
The entire Korg plug-in suite and Plogue’s Bidule will create a second “Cubase” menu item up top.
Yes, that’s happening here too.