Both are valid points, but:

The building mapping arbitrarily cuts off in nothern dalia and doesn't continue to Isfiya. I think this makes it less usable for calculations and misleading in visualizations. 

As for navigation, I do try navigation via osmand / Organic maps. The building density mid Dalia is high and the mapping is mostly plain squares, without addresses, to the point of them being mostly noise. I did keep prominent buildings that are actually good landmarks.

In the outskirts where the buildings are sparse, a building can indeed be a very helpful navigational aid, even without an address, but this is actually the region least up to date since those areas got urbanized very rapidly. And in fact, having 1 building mapped when 3 are present in a sparse area can be confusing navigationally.

This doesn't completely invalidate your points; someone doing some calculations for Dalia exclusively, not minding inaccuracies, might benefit somewhat, but it does reduce the usefulness.

Personally, I think starting over while prioritizing notable buildings (sparse or prominent), for both Isfiya and Dalia, is the best course of action in this case.

I think the best course of action is to gradually re-map, prioritizing the outskirts where buildings are serious landmarks, 