WritingTool is not only designed as a grammar checker based on LanguageTool, but as a general writing assistant for LibreOffice.
Ideas for further development (even complex ones) can be discussed with anyone interested at https://github.com/writingtool-org/writingtool/discussions.
Specific ideas for further development of the extension can be reported at https://github.com/writingtool-org/writingtool/issues. Please set the label »enhancement« for a further development suggestion.