"Robert M. Gary" wrote:

Does anyone have any insight into why the A320 isn't able to dump
fuel. What factors would go into such a design compromise?

Because they don't have to, just like the 737 isn't able to dump fuel.
No compromise.

The reason larger aircraft need the ability to dump fuel is that they
need so much for longer flights, that when they takeoff, the aircraft is
heavier than the maximum weight with which they are normally allowed to
land. Fuel is consumed during a normal flight, and the weight drops
below the normal landing weight before the aircraft gets to the
destination.

If they have to land early in flight, before they have burned much fuel,
then the aircraft needs the ability to dump fuel to bring the weight
down to the allowable landing weight.

In an emergency, when they don't have the time to dump fuel, they will
land overweight, and the aircraft simply gets an extra inspection to
make sure everything is OK before it flies again.

In the case of the A320, or the 737, they can both land with a full load
of fuel.