I suppose...
A shield rewire shield, for instance, the LCD keypad shield from DFRobot is a nice shield.. but it tends to conflict with other shields, pins-wise.
So a shield that would let you to easily change the pins of the above lying shield.. could be interesting.
agreed that would be nice i made a lcd shield myself and had to resolder the pins like 4 time's :S i now use 2/9 so i can use the spi for ethernetcard