I use this tool every week and it has become my go-to rather than using a word processor.
Here are 3 Suggestions:
1. Sure would appreciate the ability to cite a source (via small footnote). For example, we can copy/paste a text from a commentary and it will list the source, above (sort of).

Would be helpful if it listed the footnote instead - as is the case when copy/paste to a NOTE file.

2. Scriptures copy/paste to Sermon Builder are able to be edited (thank you!), however, once this occurs, we cannot click <RETURN> and change the format - it stays in BLOCKQUOTE (grayed out) and cannot be changed - for example - to NORMAL.

There are some work arounds (like having entered clicked RETURN many times to give extra space to work in below. As it is now, I highlight the text and click STYLE, then paste into a NOTE...then copy and paste into SERMON.
3. Kudos that copy/pasted Scripture in SERMON has a BLUE vertical line (when mouse hovers over), but when edited it turns LIGHT GRAY. Sure would appreciate that vertical line staying BLUE!

4. Add colors, font style/size, background to this pop up. (or enable some shortcut keys for SERMON BUILDER like inside of a typical BIBLE TAB.
So THIS could be added to PIC above:

This tool is getting better and better! Thanks Faithlife Logos Team!