I'm not in Arizona but am an estate and tax attorney and can say that there is virtually no set of circumstances where a couple will do better divorced than married from a legal and tax perspective. Married is always better for quite a few reasons.
I’ve got a more than passing understanding of estate laws myself, but I also know they vary greatly from state to state. I didn’t know if Arizona had some quirks that could impact this situation.
I have co-pays at the VA because of our combined income. If we were divorced I wouldn’t have co-pays. Not gonna’ do, though.