Hi, as many users reported here already I think it is fair to enable debugging. It doesn't really hurt anywhere and I can say that Ubuntu has enabled it as delta for quite a while without related issues.
As a little helper here the change that would enable it: https://git.launchpad.net/~paelzer/ubuntu/+source/ntp/commit/?h=merge&id=6a655d461b84c9c7301f61a510f229ee13136d06 Christian Ehrhardt Software Engineer, Ubuntu Server Canonical Ltd
