I think they have two options. Either up her viability as a fully defensive hero, or make her more supportive.
She doesn't fit neatly into the defensive or supportive category. Her builder counterpart who creates armor to support, (Torb) is classified as defensive, but his turret is a bit harder to destroy than Symmetra turrets and has more destructive capabilities. But Torb himself is also getting a rework.
So honestly....we shall see.