Sounds like Jelsoft is getting the message regarding the current lack of support for extensions:
http://www.vbulletin.com/forum/showpost.php?p=717720
I would guess that the new release will at least provide addon/hack support for:
1) Import of phrases from XML
2) Import of AdminCP nav panel/settings/settinggroups from XML
3) Import of new templates from XML
4) Hopefully, a little support in functions_online.php so that every extension has to hack that file, but would only have to set a few global variables that would be noticed in functions_online.php