User blog comment:Rappy 4187/Technical Update: September 7, 2015/@comment-126761-20150908142420/@comment-126761-20150908150625

Regarding user namespace imports, this could change - but we want to start cautious and work from there.

The review team will be made up of Wikia Staff initially - and potentially eventually trusted members of the wider community. Simply being part of that team wouldn't mean they could go around editing JS, however.