In my opinion ntp should be replaced by chrony.
Benefits of Chrony include:
1. Faster synchronization requiring only minutes instead of hours to minimize the time and frequency error, which is useful on desktops or systems not running 24 hours a day.
2. Better response to rapid changes in the clock frequency, which is useful for virtual machines that have unstable clocks or for power-saving technologies that don’t keep the clock frequency constant.
3. After the initial synchronization, it never steps the clock so as not to affect applications needing system time to be monotonic.
4. Better stability when dealing with temporary asymmetric delays, for example when the link is saturated by a large download.
5. Periodic polling of servers is not required, so systems with intermittent network connections can still quickly synchronize clocks.
I can prepare patch and pull request, but I need initial confirmation.