Towers
So Riot has said that they nerfed towers because they are objectives and not protection, essentially. But, I think they need to change the way in which they work. If you change the scaling mechanism based off of how many turrets you have left, or tiers left, etc. then you get punished for loosing towers. So the more towers you have, the more damage they do, you're rewarded for keeping your towers, and the fewer you have, the less damage they do. This achieves exactly what riot was wanting, and gives you protection based off of how well you are able to protect your towers.