Tasks synchronisation - Any way to synchronise tasks with subtasks properly?

[yukijoou]

Hi, I use tasks & subtasks a ton, and would like to know if there's any way to synchronise those in org-caldav.

Right now, the default behaviour seems to consider all subtasks as individual tasks. Would it be possible to have them available as a sub-heading of the original task?
Failing that, just the ability to not sync those and only manage them from other clients would already help a bunch

Thanks :D