Writing a common debugging/logging interface for NTP.
Redesigning NTP's logging/debugging system will improve ntpd's logging and diagnostic capabilities. It will also give better control over logging/debugging.
A consistent logging interface for NTP and its projects would simplify its codebase and would make it more consistent. It also benefits other NTP projects like SNTP by giving it acesss to its logging/debugging interface.
All in all it benefits both developers and users by unifying logging/debugging interfaces under a improved system.