I went into this reading with the impression that Rorty has a tendency to raise problems about concepts that he dislikes and then to dismiss those concepts, without taking the time to work through the objections to see how much weight they should really have. Malachowski basically agrees with this assessment, but maintains that Rorty can't be criticized for not working through the objections thoroughly, since Rorty never intends to do that kind of philosophy.
As Malachowski himself acknowledges, the lack of a decisive critique of traditional analytic philosophy means that the value of Rorty's work hinges on whether Rorty can open up a different and more valuable field of discourse. Fine. At least on Malachowski's account, the field that Rorty apparently opens up seems to amount to a "liberalism" that involves "not being cruel" and maximizing people's freedom to do what they want without the interference of authority. Frankly, I think these ideas were already available without Rorty's philosophizing, and it's not clear that from Malachowski's presentation that Rorty is able to give a particularly valuable or novel spin to them. This left me at the end of the book wondering "what was the point of that?"
Malachowski does offer one indirect argument for Rorty's significance which recurs in several places throughout the book: if Rorty's contribution is as insignificant as his critics claim, why then do they seem to be so annoyed with Rorty? Surely their annoyance is evidence that Rorty deeply threatens something they are committed to, whether or not they are prepared to admit this openly. I think I can discern a more parsimonious explanation: Malachowski repeatedly suggests that if the representationilist theory of truth is, as Rorty insists, useless, then the critic's mistake is less an error of fact than an example of poor taste and lack of literary sophistication. Now, it is possible to accuse someone of a mistake about matters of fact while respecting their judgment. But to accuse someone of having bad taste and of being unsophisticated is a direct attack on their intelligence. We probably should not be shocked if these kinds of attacks tend to stir up acrimony regardless of the substance of the issues under discussion. Suffice it to say that I am not highly optimistic about Rorty's ability to foster the kind of liberal and civil conversation that he apparently values.