To simplify matters, I think it would be useful to make a poll of the forum sensibilities, focusing our attention on the upcoming VgN. It looks to be an epic game, maybe the best Ageod yet.
Would you, if there was a chance :
1. Order a boxed edition shipped to you no matter the contents ?
2. Order a boxed edition provided it would contain "premium" physical content - namely a printed color manual, map, info cards (eg, units cards, etc), etc, agreeing to pay a premium price for such a "collector's box" ?
3. Only consider digital download ?
Pre-orders could start early (months) pre-release to gauge interest. Boxed editions buyers would have access to DD version also.
I would go with choice number 2. If the content would be good I would consider paying up to twice the price of the DD. But a boxed set with only a CD and a pdf manual or a cheap black and white manual would not interest me at all.
I understand that the investment in doing something like option number 2 would be great.
And no matter what we or the developers want, this is a niche market.
But I also believe that an effort should be made by companies like Ageod to understand what is their target audience: are they the "Steam" kids that could not care less about a manual or middle-age folks with more wide ranging interests, that actually know how to read

Another factor, and I am not being pedantic here, is a matter of "prestige": many of us are not rich, but sincerely love our hobby. Many probably do not care that much if a DD game is cheaper, and are willing to pay more to have our interests catered for. Like table-top wargamers, that love to spend hours meticulously painting their lead soldiers and would laugh at the idea of buying pre-painted plastic models.
Regards