We would love to do automatic sync, but the rules need to be different for the different types of things you can save to the cloud in SkyDemon. We discussed at great length the notion of automatically syncing planned routes between devices this year, or last year, and there were too many factors against it. Instead we improved the user interface so that it solved many of the problems users wanted auto-sync of routes to solve.
Logs is something different, and I would be in favour of automatic backing up of logs to the cloud after a flight. We have seen some users protest against this due to privacy concerns, and in fact those concerns conceivably stretch to any automatic syncing of any data, so it would need to be optional.
I'm in favour of automatic syncing of settings, but even on this thread somebody has made a perfectly reasonable objection to the notion of this happening.
The automatic syncing of aircraft profiles when they are updated is a nice idea too, albeit it wouldn't update all your saved routes which use that profile.
User waypoints in general is a feature which is due for an overhaul, and I'd like to better integrate the cloud at that point. Suggestions are, as always, welcome.