Can anyone comment on how Photoshop plugins work in the Creative Cloud? Is it identical to how they work in Photoshop CS6?
Presumably they work the same, because the actual applications will be installed on your computer, just like before.
However, at any moment in time there may be changes to the Creative Cloud applications that create a conflict with the plug-ins. Adobe will probably say that the plugin developers didn't follow the recommendations, but that won't get your issue fixed. You'll have to wait for new plugin versions to emerge after their developers are made aware.