A very innovative new LaTeX editor is in beta testing called Compositor. It allows a user to WYSIWYG edit the content via editing the visual output, then transforming that back to the TeX source. Current price is $10 and will be $20 on release, very cheap!
compositorapp.com/blog/2017-07-0 … ompositor/
Example:
It also allows you to edit TeX directly in-place:
