If William’s kids have children when they grow up, Andrew would fall farther down.
My impression, from talking with Brits, is they are thinking of ending the monarchy when Queen Elizabeth dies. She’s the last one who stood with England during WWII. None of her children have dine anything to prove their worth.
Harry may have followed some of his relatives as far as questionable spousal choices, but he served as an Apache gunner in Afghanistan. He did his duty for Queen and Country, just as Andrew had done before him. Shame that he couldn’t have married as well as William though.