Even if I totally understand your factual points (price gap increase between high-end and lower, pressure on volumes because of the crisis...) I think that such field within the Luxury sector cannot only be analyzed from the rational side, there is also all what happens in people's mind when considering these kind of goods (sidenote: I write this as I'm readin your answer and I see you take this point into account at the end as well).
Will the balance go on your side or on another more optimistic side (from the brand's side of course)? I don't have a clue.
People get quickly upset when the crisis comes in and go quickly the other way when things a only starting going better. What will be their reaction in the future (middle term)?
But I think the Steel models are not just lower-priced watches that can be used to face difficult times, I think that, for Patek, they are to be taken as Gold or even Platinum models. I wonder if it won't be better for Patek to limit pricing for gold watches, compared to trying going toward Steel. Choosing steel would be also seriously "damaging" vintage steel watches value (thus image legacy). Not a good move imho for important references (though the 5960 in steel doesn't bother me at all.... don't know why by the way).
What do you mean by restructuring the collection?
I don't think that the "price building" of the 5930 is accurate the way you present it, on the contrary of the 5270's I talked a while ago (I presume you meant 5975 and not 5575). The 5975 has a very complex case to craft and is an annivesary piece. The 5270 is placed out there also because of its iconic place in Patek's history thus it should be less that the sum of 5170+5140 imho.
Nevertheless, if you look at the 5905P, which is in Pt, the 5930 is correctly priced imho but not that low.
I would preferably take a 5960R and just replace the AC by a simpler WT module: thus a similar price price (61K€ in 2013+CHF increase + market increase) as the WT is less complicated than an AC.
But this is really rough estimates Kari.
We'll see how things turn out in the few next years but I don't think Steel brings a good solution 
Nice discussion.
Cheers, Mark