the only thing you might consider adding are drip lines on the ridgeline that dips under the tarp. Will stop water from slipping in along the line. Cheap and easy.
It is a very good idea. I think I would put a loop with a prussik knot so I could pull the net out and up. Although it looks like it is fine the way it is.
I have a prussic knots from tarp ends to ridge line but I think your right Grizz.
Dutch, I started like that but thought this was just as easy, Plus I dont have to Tie up just clip and go
it doesn't seem to need pulling out.