The ride height of the 5EXi has been designed to be 75mm. The same maximum height of a road speed bump. Which means the car could bottom out on speed bumps.
To make the rear wheel fit, cutting the bodywork is a viable option, that until now has not been considered.
Extending rose joints is another option.
As is moving the top mount of the shock down, this will increase the angle of the rear shock, increasing travel over the range of the wishbone. But negligible in the bigger picture.