Do NOT bother reading the Boston Herald "review." There's no explanation at all for the terrible score. It's pretty obviously just a ploy to get readers after all the perfect scores on metacritic.
Walt's definitely going to be hearing from whomever was behind Gus in Chile/Madrigal Electromotive, right? Don Elario's line at the end of Hermanos when he told Gus that he didn't kill him because "I know who you are. But you are not in Chile anymore" was very telling. Walt's "I won" line seems to show that he may feel that he's in the clear with Gus and the main cartel players all dead, my guess is that he's way off in this.
Oh, and that dude with the stupid Saywer avatar who lost the who poisoned Brock bet with me and is exiled from OOT? Chilltown I think? He's been welshing on the bet.