A 17 game season is ridiculous - you have to think an 18 game season with two preseason games is already on the cards...
May as well have a 20 game season and no preseason games at all - I'm sure that's what the NFL and the media ultimately want, it's just a case of the players being payed enough to cave in. As it is there are already a number of "friendly" games between teams before preseason which effectively make up for the loss of preseason game(s).
The preseason games will continue to have the same problems in the past. 1) The Vets trying not to get hurt, which sometimes causes them to get hurt. 2) Bubble guys, or guys trying to make a roster, playing like maniacs that end up hurting Vets that are just trying to make it through camp.
Another reason to get rid of preseason games altogether.