I disagree with this format as when you use the map you get a gap between the feature and the road, therefore not knowing what is in the gap - which for data I use exported from OSM is quite important.  In reality the grassland abuts road edge, and as there are not separate road surface and kerb layers, does it not make sense to draw it at it appears?  I also note that although you don't join areas of grass to roads, you do so with footpaths - what's the reason for the inconsistency between these features (i.e the footpath stops at the kerb in the same way grass does)?