So this is the current list:
* CategoryTree Is this really a feature that most people would use?
* Cite Is this something that most people really use on external sites? how popular (i'm saying this because i'm probably one of the rarer people that don't run/need it on any of my installs)
* Confirm Edit
* DismissableSiteNotice Again, how many people? this seems a suggestion for the sake of it, but i guess its up to other people.
* ExpandTemplates Is this something most sites really need?
* Gadgets * ParserFunctions * Renameuser
* TitleKey Couldn't we just fix search so it was case insensitive compared to needing to bundle something?
* Validator There is really no need for it, unless there is a extenstion that needs it that we are also bundlering we shouldn't just randomly stick stuff in because "it might be nice"
* Vector
* WikiEditor Possibly I guess, although I would actually prefer it in core compared to a extension, I'm not a fan of how it takes a little longer to load and the screen jumps around.
It would probably be nicer to set up ED to record stats on which extensions get downloaded the most and then use that as a starting point for the discussions on what to bundle.
Also have we even looked at security issues side of things? because even if they aren't installed the files will still be sitting there on the server unless someone deletes them from their extensions directory...