I don't find the aggregation very helpful - my feet being freezing and my head being boiling might aggregate to a cozy warm body, but that is misleading at best.But the contrast should still be valuable within each domain. And, from there, you have some point where the contrast is still valid in aggregate
But I agree with you that there can be useful contrasts in each domain, though I think descriptive contrasts are more useful than evaluative contrasts (which I think puts me in agreement with [MENTION=205]TwoSix[/MENTION] upthread).
I think [MENTION=66434]ExploderWizard[/MENTION] likes a high degree of player authority over scene-framing (though he probably wouldn't use that language) - the players choose what they encounter, via scouting, divining, and clever play. (As Gygax describes in the concluding pages of his PHB.)
I prefer GM authority over scene-framing, because for my preferred style the players have a conflict of interest if they set their own challenges, because they have an incentive to minimise the challenge, which goes contrary to the aesthetic demands of dramatic play.
I don't think it's really of interest to anyone but me or ExploderWizard which approach one or the other of us prefers - that's just biographical data. What's interesting for others, I think, is idenifying what sort of play you can or can't achieve by adopting different techniques. (I think this also puts me in agreement with TwoSix.)