(Obviously, spoilers present. 'Nuff said.)
Linda Holmes, who writes NPR's "Monkey See" pop culture blog (a must read, in my book), expressed her own dissatisfaction with the episode stemming from her interpretation that ultimately Walt went out exactly as he wanted to, by his own design, allowing for his own megalomania. Even with his admission to Skyler that it was all for him – and not the family – and that "I liked it," decisions such as manipulating a method to pass along his money to his kids – thereby depriving them the choice of declining it -- was neither loving nor kindhearted.
Willa Paskin described on Slate why the finale was unsatisfying to her, or at the very least left her conflicted: "After everything, after five seasons in which the writers were clocking Walt’s every misdeed, at the very end, they turned out to be Team Walt. Despite everything he did, Walt was rewarded—not with life, too much had gone down for that—but with a death on his own terms. He died having provided for his family, without going to jail or giving up on his legend."
I really enjoy reading both Holmes and Paskin, along with the A.V. Club's Donna Bowman and the throngs of other great writers expounding on Breaking Bad, and yet unmentioned in everything I've read is the one element that formed the heart of the entire series, which also happens to be the one area where Walt irrefutably had no control and did not "win": His relationship with his son Flynn, a/k/a Walter Jr.