Yes, I get it, the grouping makes sense, and also helps the layout when switching to the icon only mode.
Are you only using icons when working with the nodes? For me that is somehow too many icons to remember^^, so I always turn the text on with the icons as well. – I noticed, that there is a “tooltip” when I hover over a specific icon, but they all say the same right now. I am not sure if more specific tooltips could be added there easily? This would improve the icon only mode usability quite a bit as well.