You have to price out both options to see what would be the better deal. For myself getting the room discount is the better deal, while I like the table service meals, ordinarily I just do not like eating 'to get my monies worth". I price out the cost of the room, what the meals would cost using my normal eating habits. I always throw in a few table service meals, and I still make out with the room only discount.
Now I have the DVC so I will always have my room "paid for" so I do not have to worry about that anymore.