Hopefully, your student has chosen a racquet that feels pretty good to them, so drastic changes should not be needed. If your student is resistant to changing the characteristics of their frame, you might remind them that even tour players, who are very careful to choose the very best racquet, still customize their equipment. The main factors to be aware of when customizing a player's frame are weight, swingweight, torsional stability and sweetspot. Weight is fairly obvious. It is how much the racquet weighs when you put it on a scale.
Weight is important because it indicates how hard a racquet is to move forward.
Remember, even short choppy strokes still travel forward. Swingweight is a little more complicated. This is important because it is a measure of how hard it is to get the head around the point of contact. Remember that even a very short stroke can involve more than 90 degrees of rotation for the racquet. In fact, swingweight is probably the number one thing that players feel when they swing their racquet.