If you got a big list of checklist items, a newly added item goes to the bottom. So having an extra action button next to "delete" and "create a card from this item" called "add new below" would be very useful. For now I follow a one by one structure and in a list of 20 items it's problematic to move the item to a specific place, sometimes I create a long checklist over time and I have to sort it. For now having more categorised checklists works.