Hello.
While I love the new 2017 wikitext editor because of its expanse, it is impossible to see the full ramifications of the edit before publishing it. This was not the problem with the old wikitext editor. More specifically:
- Accidental misspelling of a category's name is not seen in the preview.
- List of used templates won't get updated.
- The effect of {{lowercase title}} or other title-changing code cannot be previewed.
- Category changes resulting from addition of new templates do not appear in the preview. For example, try inserting a {{Use British English}} template in English Wikipedia.