Most books have a feeble ending. This is because the plot ends the book, not the characters. Most books end either with death or marriage. The novel typically goes off in the end. The characters go dead. This is a primary technical problem of the novel.
It reminds me of the end of Steinbeck, Grapes of Wrath, which is a great effort at leaving the characters intact at the close of the novel. The end of the novel is the daughter breast-feeding the man who was starving to death with the milk in her breasts meant for her baby, which had died. It accomplishes both life and death, giving both resolution and hope. Looking at it now from the perspective of the writer, it shows Steinbeck’s amazing maturity of craft.