Prefacing all this by showing my undying love for Scrivener and everything it offers so far! I just wanted to drop some wishlist items (and hopefully they haven’t already been mentioned a hundred times already.) I’m on the Windows version of Scrivener, so apologies in advance if any of this is already present on the Mac version.
All of these suggestions are more in mind for users who don’t use Scrivener for the purpose of making/formatting manuscripts for print, but rather, just use it exclusively for digital writing and notekeeping/organizing. I often use Notion.so for outlining because it gives a lot aesthetically pleasing stylization options, but I’m gonna be honest, I’d rather be in Scrivener basically always. 
Anyway, I figured I’d drop these in the suggestion box and see what happens, just for the anyone else out there who likes to go down the formatting/stylizing rabbit hole when they’re making outlines or series bibles.
Full-width Paragraph Background Color Styling
Kind of like highlight, except instead of just highlighting the text, it will highlight the entire row, margin-to-margin. I’d love to be able to do that and save it as a style. I tend to use the big colors as ways to keep all the text from blending together. It’d just be really cool to be able to do this the way css/html handles it and save that as a style. Currently, unless I’ve missed something, the only way to achieve this is to make a 1x1 table, give it a background color fill, and use that as your heading background (but this doesn’t save as a style, it’d have to be manually copy-pasted each time it’s used.)
Drag & Drop Entire Paragraph Blocks
Just an alternative to highlighting the paragraph, cutting, and pasting elsewhere. I like how in notion, I can just hover my cursor over a paragraph block and a little icon to the left of the paragraph appears which I can grab and move the paragraph block around. Basically drag & drop.
Drop-Down Toggle
Can’t recall if I saw WP’s text editor incorporating this also, but Notion does this thing where you can convert a text block to a Toggle where you just click the arrow and get a nested block to put text or any other content into. Great for making notes within a document and being able to hide them while keeping a topic title visible.
CSS Customization Options For Use In The Text Editor View
I haven’t tinkered with the manuscript/ebook formatting side of Scrivener, but I hear the Compiler has some pretty powerful ebook formatting options to those who know their way around CSS. It’d be really cool to be able to have CSS styling options that could reflect in the general text editor and/or composition mode view, too. Stuff like being able to just go in and put your own CSS would be really rad.
Just some things that might be cool to see at some point. They’re not wildly important things by any means, just some glam & fluff.