I am happy to say that Jim (CEO Diecasm, LLC) and I came to an agreement on the model.
Great to hear Jim Cowen is taking care of the situation. He seems like a nice guy, although I've never met him in person. Hopefully, if everyone's happy, he'll have Automodello revisit our marque some day (hmm, Lister LeMans Tiger? Wouldn't that be interesting).
He seems to "travel in a different orbit" than we're used to; while we might not be thrilled about getting stuff from, say, SS in ten months, Diecasm takes it in stride and I guess he has to, with waiting for dies to be made and approving prototypes (I understand this does not always go according to plan!) Myself, I wanted a Dual-Ghia, my wife ordered one for me and it was so far out in the future she switched the order to something else and still it took forever (past X-mas, Valentines day, our anniversary and my birthday, ugh). Somehow you almost hear the exchange between Rex Harrison and Charlton Heston: "When will you make and end of it?" "When I'm finished!" OK, that analogy is a stretch.
As for opening-door detail, I'm not what you'd call an avid collector. But, I tend to see such openings only in lower-end 1/43rds like Corgi, and the shut lines aren't pretty (my Iso Rivolta, for instance, has "dropped door syndrome" and unlike 1:1 scale, I don't think it's readily fixable); but sometimes I buy them just to round out the collection. YMMV