OmniFocus is actually an outliner too (though it calls each block is a “Task”), and I found myself wanting one of its outlining features in Logseq.
Say I’ve selected a few blocks and realize I want to put them all under one new parent block. Currently I have to deselect, add the new block above, select again, and press Tab. But what if I could just Group them using a single action? See their docs for an example:
https://support.omnigroup.com/documentation/omnifocus/mac/3.0/en/the-outline/#grouping-items
macOS Finder also has a “New Folder With Items” function that I use quite frequently, which does basically the same thing.
I’m not sure this is worth the complexity it would add, but perhaps could go under the general category of improving the experience when selecting multiple blocks.