Neighbor had all 4 strut assemblies replaced on.

Neighbor had all 4 strut assemblies replaced on her 2001 Avalon. She said the car rides real bumpy. I checked out the car and the rear end is much higher than it used to be, there is no give in the rear end when I apply weight on the rear or try to lift the rear (Very tight, reminds me of spacers in coil springs). Is this a defect in the struts installed or will this issue resolve itself. Very uncomfortable ride right now.