There are (were) the currently used categories that start with "New items in …". They seem mostly used to indicate that an item is newly added by that specific expansion/enhanced edition to the base game/original edition. However, there are also articles with a list of such items (currently only for BG:EE, SoD and BGII:EE, not for TotSC and ToB).
I'd like to change this, so that "new" says, that thing is new and wasn't here before, instead of "being new to the stack of known/available things". Such as the Merchants' League Counting House after the installation of Baldur's Gate: Tales of the Sword Coast, or the mentioned Watcher's Keep with all stuff from it; creatures or spells with altered stats in Siege of Dragonspear that now also are different during the Baldur's Gate campaign, etc. And not anymore for all things that were added to the existing BG:EE stack of things by SoD. Else we would also need "New in SoA", to have a category for all things added/changed in the second part of the series, compared to things available in the first part.
But I like to have your opinion on this, dear reader of the wiki. :)