Lemon Butter Sauce too acidic
If that is 1/4 cup lemon juice, that seems like quite a lot and reducing it is also probably making it taste even more lemony. If you want to keep about the same amount of liquid, try softening the shallots and garlic in 1 t olive oil and then adding 2T dry white wine and reducing. Add 1T lemon juice and bring to boil again but don't reduce, add in the cherry tomatoes, scallops and the 1/2 stick butter. You could also reserve half the butter to swirl in after the scallops are cooked through.