What’s wrong with a shriveled cell?
Plant Cell

In the case of plants, shriveled cells are a huge problem. When plant cells are put in a hypertonic solution, the cell wall remains turgid and stays that way but the plasma membrane doesn't, it shrinks as you already know with the other organelles as well. This is known as plasmolysis. If this situation continues it causes death.


Shrivelling  causes the plant to wilt too.


Animal Cells

Well it does have affects overall and at cellular level


It changes the RMP(resting membrane potential) across the cell because of change of sodium ions outside the cell 
-It decreases rate of metabolism