That should work like zbrush obviously… That’s the whole point of a brush menu/palette… to have a place that you can access all your brushes at once… no more hunting and guessing where things are… that “under” thing was a terrible idea and needs to be removed…
There will be just one brush tool, everything else is gonna be a brush preset of that brush tool…
And no, brushes in the sidebar is a big no… that’s the whole point of this conversation in case you missed…