Okay to bring this thread to a close, here is what my to-do list looks like based on these discussions. No promises mind you but ..
Already In the Next Release (Sigil-1.5.0)- Add tag begin end pair highlighting to CV
- Enable automatic selections for common editing operations based on cursor position for CV editing (Bold, Italic, Headings, etc)
- Enable Saved Searches to read in from csv and text files to automate search and replace (ala Atlantis WP similar feature)
- Enable Nav to include of role="doc-toc" on nav toc and similarly for page-list
On the List for Future Versions of Sigil (no particular order and no promises)- Add Indicator in Status Bar if epub in old Sigil "Standard Format" or Preference to force load into old format
- Split updating of manual into workable sections and ask for volunteers
- Basic Table-based Metadata Editor with an "advanced" button to go to current one
- Allow users to create their own replacement functions in python3 for Search and Replace
- Add a regex validator to validate regex expressions used in Find and Replace
- Add a flag to limit search to Find in only Open Tabs
- Make Saved Searches keep track of all the search flags they were used with (by saving options flags)
- Make default Shortcuts be smart about use of alt on international systems that use/need alt and altgr
- Flag to control writing of Sigil version to metadata (under consideration only since doable via plugin)
- Some form of supported templating for HTML TOC and Index generation (under consideration but doable by plugin)
- Multiple paragraph justification setting via the CV alignment icon (although PageEdit does this now)
- Add a tool/icon to automatically remove matched begin/end tags based on cursor position in either start or end tag
- Add a regex to be used to build TOC when no headings tags exist (considering but this is against accessibility, as headings are important.)