2144941:I think the level of scouting you're talking about is either impossible, or its just simpler to consider every card as a threat. As I understand things you can change your party to any model in your arsenal in between each round. When you make this change you bring 3 cards to the table, then you see which characters the other player brought, then you cut your action cards down to two. I mean the best that you could do is know what model the other player has in his arsenal.
Changing models between round of a tournament? I don't want to bring a truckload to any tournaments. If we can change band between round of a tournament, they just lost me as a player!
If you ask me, the place you saw this information was talking about playing with your friends, not playing at sanctioned tournaments. How would you call that "Constructed" otherwise?
Having a limited side deck is OK, and having to select 2 cards out of your 3 cards per character pool covers that area.
PS: I don't have information to confirm this, but being a D&D minis player, I can say that changing your warband between rounds would be chaotic thing in official tournaments. So I'm wishing I'm right. If I'm not, I will greatly reconsider my playing this game.