I have already played through the game single player and I am about to finish going thru again playing Multi-player. I, of course, have saves from periodic places in the game including just after emerging from Irenicus' dungeon.
So, wouldn't it be possible to import a new PC into the game in the party lead position and start from there? You could create the PC and then, if you wanted, add some XP using Shadowkeeper. Then import him/her and off you go from Waukeens Promenade.
Here's where it gets good....
Using that same line of thought wouldn't it be possible to have your protagonist keep switching so you could, if you wanted, play through several stronghold quests without having to start a new game? It would be nice to get a save game file or character file from someone who has a save from early chapter 2(ie. I have wanted to play a monk). Then put them into the protagonist slot, play thru the stronghold quest, dump the monk for a cleric and do that quest.
Does this make any sense? Or am I raving mad?

Hex92