We've found that we can't implement some of the new forum discussion functionalities (as part of the forum facelift) because:

• We don't know if the user can lock discussions
• We don't get the favourited/starred information for discussions for the current user
• The existing WS for retrieving discussions does not support the new ordering methods

In order to fix this, there are two different approaches:
1 - Deprecate the existing mod_forum_get_forum_discussions_paginated and create a new mod_forum_get_discussions using the new exporter for discussions adding the starred information
2 - Just add new fields to return the required information and update the existing mod_forum_get_forum_discussions_paginated WS

I'd personally prefer to go for option 2