Personally, although you make a good argument in terms of Cook's fairly obvious weakness against spin, I can't see any reason why you'd break up England's most successful opening partnership in decades at a time like this.
Trescothick might be going through a poor patch, but I don't think dropping him down the order would help - the quick starts he helped us make were vital last time around, and I think opening with Cook might just serve as a greater reason for them to bring Warne on earlier, which could well lead to Strauss getting out!
I can see a future for Strauss in the middle order - but not yet. Maybe when Bell is ready to become a regular number three for England - Bell-Strauss-Pietersen looks like a very solid middle order.
