I'm so glad you like it! :)

" QuickPost feels like it is mere inches away from perfection. One of the downsides of the plugin’s “Add New” button is that it is literally a element. This means that users cannot right-click on it and open a new post editor in another browser tab/window. For that functionality, the button would need to be a link () element. This is also the difference between the plugin and the classic editor."

Hmm, good point, I often did that too! Some options:

Add the option to open in a new window in the kebab menu
Change it to an anchor link like you suggested
Default the button to opening in a new tab

Thoughts?