I've only read the first one. The changes were minor, but I think they were all good. They now have three encounters for people entering Solace, for instance, so they don't all just happen to meet outside of town for Toade. They brought the story of the restoration of faith a little more into the fore, not enough, I think, but I can do that. All the authors seem to want to pull away from that storyline. They did set up a great scene to roleplay with Elistan, where the prophet tries to convince him that he's worthy of turning to the gods.
The major storytelling problems in two and four are still there. They draw attention to them in two, but didn't try to fix them. Four they still just plop you on the railroads for the climax, but I feel I'm a good enough of a GM to not be bound by that.
I've SKIMMED dragons of winter and looked at the PDF of Spring. In War, they refer to you using your favorite mass combat system for the high clerists tower, but they don't give you any of the tools to do that. The units aren't stated and at least some are different from War of the Lance sourcebook. They don't have unit commitments or victory conditions, but they have three battles, so you know they aren't committing everything and fighting to the death. I'll fix the stats by making them up and the engagement details by stealing them from the original adventure. This is the only complaint I've had so far, and it's only relevant if you want to do mass combat.
Our party:
Leader: A solomnic knight wanna be.
Sage: A white robed wizard who's just passed her test better than Raistlin. I decided par salian had tried on three different people to make the sword the gods demnaded, and our wizard did best. Raistlin is laid up for many months in this version, as is the mage's cousin. Our mage got the staff and dagger of magius.
Rogue: A Kender
Prophet: Male heathen cleric and battlefield medic. I've been giving him visions of the lost citadel and he's looking for the gods.
Protector: Female fighter. Has a little thing going on with Kitiara.
Ranger: Female half-elf ranger. Bastard daughter of Porthios, though he doesn't know it yet. He mother is a bad lady and has damaged her opinion of elvers.
Hawk: Silvanesti elf noble, trying to get other people to fight the dragonarmies to rescue Silvanesti (they say to have elves be qualinesti, but I thought this added drama.)
In winter it will be:
Rogue: Same
Shepard: A female version of Elistan. We're calling her Elista at the moment. She'll be among the slave in Flame.
Hawk: Gilthanas, as presented in the adventure. He's the Ranger's uncle, so she asked is anyone was willing.
Idealist: The leader from the first four will evolve into this archtype. (he needs to meet the knights)
Gallant: The Ranger from the first adventure will evolve into this one (she needs to meet her father again.)
Mentor: Assigned, but not designed. (I killed flint last night and Tanis lost his faith.)
Last one: Barbarian, don't remember the archetype. Assigned but not designed.
NPC: Larauna (Gallant's aunt.)
In Spring they will be:
Leader: The former protector will step into this role.
Conscience: Assigned, but not designed yet.
Sage: Same
Prophet: Same
Noble: Assigned, but not designed (probably not Alhanna Starbreeze).
Rebel: Maybe Kronin, but almost certainly another kender.
One more assigned but not designed, and the former hawk, who is evolving into one of these archetypes, I don't remember which.