Second try: still not The Solution
So, I experimented with adding the steps to the table. Usually lawyers task names are enormously long, and I thought, why not make the step full width? This solution turned out to be a gateway to another problem.
Because often users add many columns to a task, the icons ‘Convert to Task’ and ‘Delete’ became hidden. Users had to scroll horizontally to find out they could delete a subtask. This would lead the user to frustration, being stuck with an item they cannot delete. Not great at all.