I for one would really, really, really like to see full backup of all data to servers outside USA, if necessary with anonymized contributors. A first step would be to store digests for the revisions on alternate servers, and make it possible to double check the validity of the content. That is, a canary for the content.
No I don't think WMF would tamper with the content, but it might not be up to them to stop it from happening.