Feature Requests:
Tools - Reports - Characters in HTML Files.
Currently, this report correctly goes from HTML entity names/decimal/hexadecimal and actual characters -> the report. What it does not do, is go the opposite.
When double clicking on a character in the report, it brings you to the next instance of only the actual character, but it does not find named/decimal/hexadecimal instances. I attached an image showing how clicking on 'ô' does not lead to "ô" in the HTML file.

Tools - Reports - Links
While clicking on a link in this report, you would expect it to lead you directly to the location. Instead, it seems to only open up the HTML file in which the link occurs. From there, you have to manually search for the link.
Entity -> Character + Character -> Entity
Also, a nice thing to have added might be a setting for Sigil to automatically go from entity (names/decimal/hexadecimal) -> character, character -> entity (names/decimal/hexadecimal).... currently, I am doing this the slow way by mass running a huge batch of Saved Searches.