Project Management convert between Tasks and Sub-Tasks

In a competitor product, we used to be able to very easily drag and drop the order of tasks within the Plan tab. We would very much like to be able to do that as it seems very foundational to organization. On top of that, we could also easily change a task to a sub-task and vice-versa which is not possible at all in Freshservice. 

The problem? One starts to create a list of tasks and in the process realizes that it would be better to group them into smaller groups. This is easy enough to do if you know ahead of time that is what you want, but in the current version we have to delete all the tasks and then create them as sub-tasks thus tripling the amount of work required to manage a project.