A few key things I've noted that are keeping my mind sane on this one...
1) the validation periods noted (i.e. 5 day validation period on a 3 day ticket) are for off site visitors. If you are staying on site and have booked a package that same 3 day ticket will be valid for the duration of your stay even if it is more than 5 days), i.e if you buy a ticket for start date Nov 1 and you have a 7 night stay, you can use that 3 day ticket from Nov 1 through Nov 8th. So the validation period really doesn't change for onsite, package purchasing guests.
2) The will be maintaining the current philosophy of decreasing cost per day as the number of days you purchase goes up. I fully expect an across the board increase, but you will still have a better value per day with a 10 day ticket than you will with a lesser day ticket.
3) If I book a package and need to change my arrival date, the ticket will move to that new arrival date but I will need to pay the difference if my start date changes to a higher category (ie. from value to regular season). I think the big losers on this point will be people who book a package but use an AP for their park entrance and save the package tickets for a future visit. I think that option will no longer work, based on the info released so far.