I will use a blog for this, so I can directly reply to each reported incident.
Tables, sortable tables, and many templates were migrated to the new theme.
All changes that could be handled centralised were migrated. Still, we use a lot of templates, and I was not able to check each and every article personally. If you encounter anything that looks oddly out of place / colors that don't match the general theme, please report them here. If no issues come up, I consider the wiki completely migrated. Thank you