In MS365 planner one can add checklist items to a task. In smartsheet it would have been nice with either a new column type for checklist or more editing possibilities (rich text formatting ) for the text fields.
This way one could make checklists for allocations. That is, for a row with a task spanning several weeks, one may need to break it down into lots of sub-tasks too small to allocate to an individual. The overall task is allocated to an individual, but e.g. making allocations on three or four hours tasks doesn't make sense.
So some sort of checklist or sub-tasks would be convenient. I've tried using indented tasks, but it becomes messy and doesn't work very well if one has dependencies turned on. Then one must make a dummy task under the main task and set the allocation on the dummy task.
I've also proposed an alternative approach here: