I have to say that it was a big dissapointment to find out that next season is once again starting over at level 1. I have looked at the supplemental material that was in the latest packet and I have discussed it with the other DMs at our store and we have chosen to run the adventure at level 4-6. In fact, this season looks like an ideal opportunity bump the adventure to the next level tier.
Most of the enemy stats look like they can be easily bumped with a few exceptions such as the Witch and Dragon. Opponents like Human Warriors and Thugs are easily bumped. Monsters like Orcs, Zombies, Wolves and Green Slime can be substituted with Ogres and Wraiths, Dire Wolves and Ochre Jelly. In fact, it opens up possibilities for the DM to be creative with other options as well.
I don't know about you guys, but my players, currently getting a taste of level 3, are ready to test out all of the cool abilities they can see in the next few levels, some of them want to continue playing their current characters. I also have a feeling that Scourge of the Sword Coast will again start at level 1.
Fair warning, doing this will obviously imvolve a little extra work for the DM, so it may not be wise if you are a DM that doesn't have time to do the adaptation justice. I'll probably use this thread to post some of my modifications though.