I had a similar gap in the neck pocket on my TL1 build, pick guard covered it fine. You probably want to enlarge the bridge pickup route so the bridge will sit in closer to the pickguard. Check the link in my signature to see what I did, went for a similar look to your plans. To do the edge bevel you can make a template to check and adjust it or make a radiused sanding block. I've used a small cornice off cut for that before.