I'd missed both the significance of the Doctor not doing anything to advance the plot, and have acknowledged it in an appendix to my post.

As for deification, I think in this case the 'DoctorDonna' is becoming a folk hero of the Ood rather than godhood as such, though I suppose there is a rough parallel, and it could be a way of making something more of the Doctor's/RTD's 'god complex' than has previously been developed.