Two of my favorite courses (Rustic Canyon and Pasatiempo) have a mixed tee option on the scorecard (for Rustic, the Hanse tees, for Pasatiempo the blue scorecards) and whenever I see that, it is an automatic play. It keeps you thinking as you approach the next tee box and it so much fun to see where the mixed tees put you relative to the rest of the tee box and it does change what is in front of you for your next shot.
I wish more courses would offer a mixed option on the scorecard. No need to create different boxes, just different thinking!