Wait a minute. I might be having a senior moment here. I understand moving the kick off spot back to the 40. That will result in more kicks into the end zone which will result in touchbacks. So far so good.
But moving a touchback back to the 20 from the 25 will discourage teams from taking the touchback. Is the idea that the kicking team can put it deep into the end zone whenever they want to, and therefore you don't want to discourage them from doing so by moving the ball back to the 20? I honestly don't see kicking deep into the end zone as all that automatic. Certainly never has been for us.