He can be commended for thwarting the myth of the rational human (a shared notion with that lovely bunch, the objectivists).
But I think he mainly fails with the details. There are many shared values across all society and those, in my opinion, control the narrative a lot.
My favourite example (here repeated) is the notion that more material wealth is always good (and that hard working is good). Very little people fight for less work after a certain degree of material comfort (which most people enjoy in Western societies). People that want to work less as seen as lazy. In fact, if you prefer to work less you are probably better off in keeping that opinion to yourself.
Another example is the idea that you can do whatever you want as long as you don't harm others (this one with many good consequences). For instance, it is very difficult to frame opposition to same-sex marriage because it stumbles on that shared assumption. The arguments that I've seen used (during that debate in Portugal) were of the guise: lets not waste time with this (the biggest argument that was presented was this!) and, to a shorter measure, need for the population to reproduce.
Another example is that politicians are expected to pander to voters. This one is particularly serious (and false) and I intend to get back to it.
Really not a single new idea (especially if you come from a starting point where you already disbelieve that humans are rational). Plus a series of too easy stereotyping and cartoonization of people based on their political choices. Mind you, I am not that much against stereotyping, but this is above the limit (and wrong, sometimes borderline offensive). Liberals do not follow laws and conservatives do not feel. Yeah, right. Also the single linearlity idea (left to right).
Ah... and the strict/nurturing father stuff: not particularly new.
This is only "new" and "interesting" for people who come from a strong rationality view of humans.
But the "Politics of the Mind" is neither new, nor interesting nor intellectually strong. It is a set of liberal platitudes with added... nothing.