this would solve a LOT of problems for me!
currently i have my main todo in its own document and then every hobby gets a separate document, programming, photography etc where i will add any random idea i have for those projects. any time i actually start working on one of them i will create a [[ link in my todo list document… but i usually have another todo list inside of each project idea so if i want to see that i need to click the link which takes me away from my main todo list
really, just being able to expand and glance at whats in linked item would be enough for my use case
as for whether to delete other clones as well, im not sure actually. but if there is a reference of each clone then there could be a dialog box asking whether you want to delete the others as well. that might be a way to keep everyone happy