Maury Klein wrote a book a few years ago, titled "The Life and Legend of Jay Gould." That book tried to rehabilitate him. The Renehan book goes much further. For example, itt effectively refutes the notion that Gould was responsible for his first parner's suicide, and it presents Gould in a human light.
That being said, Gould was not exactly a good citizen. He did loot the Erie, and his low point, ethically speaking, was the 1869 attempt to bribe officials of the Grant administration and create a gold corner. Renehan's book minimizes his misdeeds in that enterprise. Aside from the corner itself, Gould used his Tammany connections to crooked judges to weasel out of paying legitimate debts he incurred in the corner attempt, and to judicially mistreat his opponents. In effect, Renehan and Maury Klein argue that he was no worse than the other robber barons, but I would say that the gold corner and its aftermath was something especially bad and corrupt. I think that that is why he and his family were ostracized by "High Society."