I failed to get some proper DR working.
Since there are soo many other awful things to take care of, I started working on some other things closely related to player movement.

Anything which is not a player currently is created on the server, moved on both client and server and synced by the server. My simple smoothing algrorithm works fine for that as I don't have to care about latency.

The players however are far more difficult to handle.

Next step are adding events like getting hit. Then I can test a bit more