We reviewed this request and decided against adding it to our road map, for the time being. That said, we will definitely revisit this in the future as our product evolves :)
Regarding Shopping and Grocery lists, we will soon release the Grocery List feature which was designed specifically for these scenarios and will exclude such lists from the Moment feature.
We appreciate your feedback and input!
We’ve released the option to reorder sub tasks on all available platforms. We will review other action items in this suggestion during 2019 and will comment with any updates.