We’ve talked about this previously. I’m surprised this thread in particular didn’t pop up as a similar idea when you made this post. Long story short: Dramatica is a cool model, but I don’t think it’s “scientifically rigorous” or what have you.
Independent of whether it is a theory or a hypothesis or a model or a whatever-you-want-to-call-it, it is our opinion that Dramatica is model of story, while Mental Relativity – on which Dramatica is based – is a model of human problem solving and/or psychology. Dramatica represents an application of Mental Relativity to the narrative process. Though not widely advertised, the application of Mental Relativity using the Dramatica model as applied to real world scenarios is called Thoughtform.