Again, there is no
significant change, for better or worse, about where the application is
looking for plug-ins. (This is a common refrain: There is far less
different about Creative Cloud than people think, as far as the desktop
applications are concerned. The differences are just about how
activation works.)
Having the application and/or installer be
smarter about where to look for extensions is a fruitful area for
feature requests.
Currently, I use aliases/shortcuts, so the
newer version of an application follows that alias/shortcut and looks in
the old location. That's nothing new; I've been doing that for years.