Board Thread:New Features/@comment-26943142-20151012201043/@comment-24473195-20151013192057

Moving columns in simple tables would not be a hard thing to do. But changing a complex table would create problems. That's because wikitables and html tables are too flexible and to be honest they allow nonsensical constructs, and if you mix in colspan or rowspan, it becomes worse, add to that tables inside tables, and tables generated from wikitext and you may start to understand the issue.

Anyway, you are better off asking wikimedia to add this functionality. Wikia doesn't seem to be actively developing any element of either the VisualEditor or the RichEditor, and they seem to merely backport whatever wikimedia does that suits their purposes.

This is the enhacement task that is tracking the functionality that may be eventually added to the VisualEditor: https://phabricator.wikimedia.org/T88694.