I think you greatly exaggerate your originality here.

I thought it might come across that way, but didn't want to invest a bunch of time listing my intellectual debts (the post is long enough already). For the record, I'm aware that my ideas aren't entirely original, and I suspect that when I think they are I would be able to find similar ideas in others' writing independently.

the fact that it has been around for quite a while without seeming to have radically triumphed over all rivals does provide some reason for doubt about the extent of its world-beating potential.

I think that part of the problem here is that pragmatists didn't spend nearly as much energy on the details of applying their ideas as, say, Carnap and Popper did. They also tended to keep their discussion of pragmatism to philosophical circles, rather than engaging with scientific circles about their research. There's a lot of inertia to fight in order to shift scientific paradigms and the pragmatists didn't engage in the social and political organisation necessary to do so.

I think I've provided a fair summary of some of the benefits of wearing a pragmatic thinking cap. And I'll be outlining those and others in more detail later.