We had a discussion about it and unfortunately we didn't find a workable solution. For instance, Landal is using Krimweg 66 for one of their cottages and since Krimweg 66 already exists this would mean that there would be double address numbers on the same street if we would use the Landal numbering system. 
The BAG numbering system is well thought-through and Landal is causing confusion with their numbering scheme.
https://community.openstreetmap.org/t/landal-nummering-bungalows/119284