The loss of functionality that was provided by Analysis Studio is the main thing stopping us moving from 10.2.2. to Cognos 11 just now.
Just telling the users to continue to use AS isn't really an answer, partly because it restricts them to using Internet Explorer, which isn't really an option for us as we head into 2019.
Is this still affecting others? We have a whole list of things that AS does for us just now, that there's no replacement for in the new tools in Cognos Analytics.