Haltherrion
First Post
Do you mean that you expect to spend 2 to 10 hours per session in addition to your months of preparation?
C'est magnifique, mais ce n'est pas la guerre.
Your "true sandbox" is definitely not the only alternative to your story driven game. Neither is it, in my experience, normative. No advice I recall having received, or would ever give, about playing Dungeons & Dragons, would suggest such a labor-intensive scheme.
Not that I spend that much attention to the fluffy parts of the DMG but that amount of time is fact what the latest DMG recommends on game prep. But regardless, I do indeed spend that amount of time on session prep.
As for sandbox versus referee driven, I have never discussed it as an either-or. It's a spectruum. As I've said before I tend to play in the middle with some campaigns more sandbox-ish and others somewhat less so. Additionally, what I've been saying is that referees should consider that full spectruum of options and decide based on their needs where to place their own campaign along that spectruum because, to me, there is no particular virtue playing in one spot versus another spot.
Two key ingredients that seem to figure much less prominently in your model are organic growth and improvisation. You are approaching the game more as object (body of data), relative to the emphasis on it as process.
We just haven't gone there yet. If you like, how about starting a new thread to explore all these axes.