Hi Abigail and thanks for your pictures and question about your beautiful maple tree. It looks pretty healthy, but the side branches are extending out pretty far. I think I would contact an ISA certified arborist who could look at the whole picture and tell you if you need to pull it back a little. They can also tell you if it is Verticillium Wilt that caused the dead branches.  Here is a site that will help you locate an arborist. You might want to get several opinions if you don't think the first one seems right.
https://www.treesaregood.org/findanarborist/arboristsearch

Good luck with your tree!