I would strongly agree with the argument that cross bunkers are appropriate for modern architecture - just as creeks, water hazards, etc...
I'm a strong advocate for reeling back the ball to reasonable levels. Until such is done, cross bunkers seem to me to be a straightforward way to add distance to a course. Specifically, causing players to play clubs other than driver off a tee, or to add risk reward with strategic placement, players are faced with different / longer approaches into greens, layup shots, etc.
Take Pine Valley, for instance. Would seem to me that longer hitters must select logn irons or fairway woods off of certain tees to keep the ball in play. As a result, driver & wedge may not be an option, despite the yardage on the card.