Ask HN: What do you think about this idea?

What do you think about a CMS+Theme designer that compiles to Microsoft Word?

I write 100's of pages of business documents per year in Microsoft Word for my business.

My pain point is threefold:

A) Managing versions

B) Formatting to company guidelines

C) Keeping content separate from formatting

D) Managing comments

I have an idea for a document authoring tool that combines my favorite non-coder sites' functionality to solve these problems.

A) Use the Squarespace Content Manager to organize sections of a document, with ability to input text, table, and image blocks.

B) Use the Svbtle dashboard to organize documents and their contents (think file manager with TOC tree nested beneath each)

C) Use the commenting system from Medium for comments

D) Theme picker to format content from A)(ideas?)

Use all of that to export to a Word Document that has my formatted, designy content where I can make final adjustments to the document. Has it been done? What are pitfalls? Why do we use Word to write content and format documents when it is bad at both?