In my world the only advantage a cut in shelf would give me is that the arrow shaft can rest on the bow in more positions than without a shelf while hunting in a stand for instance.There are cute ways with a small rubber band to hold that shaft there on the shelf.
In the end if the arrow flys clean and true for the shooter.That's all that counts.I personally want 0 restrictions or bumps etc. in the way of my shaft in the beginning of the release.
I feel the same way about my constructions on bows.It's personal thing with handles.My no shelf bulbous handles feel very comfortable to me too.