Then try the add crease command in V7, it’s called just _Crease
You can try my TerrainMesh plugin if you like, but if you use points as input it should give about the same result as it is a delaunay mesher.
You can also try to reduceMesh the result a bit to get rid of small edges etc. (Reducemesh to 90% so you only remove 10% can be worth a go)