This is an extension from another posting, which I place here for clarity and organization sake. This thread is for Burnt Offerings; if you have suggestions for other parts of the AP, please put them in another thread.
The adventure's start is critical. Sandpoint is a rich roleplaying environment, and it takes little effort to bring the PCs more fully into the town.
Prior to the Swallowtail Festival:
1) let (or force) the PCs listen to the gossip around town
2) I forget where the thread is with jobs before the festival, this is a great way to introduce the PCs to NPCs and places. The more they value Sandpoint, the more likely it is they will be proactive in defending it.
Having two or three potential "meet this NPC" encounters for each NPC would be welcome. Let the players find the NPCs they love, and the thought that Sandpoint could get wiped off the map suddenly becomes something more critical than "now we have to walk farther to sell off all this stuff...".
Having relationship handles for various NPCs (and noting which NPCs gain benefits from their romances) would help the verisimilitude.
The death of one of the goblin chiefs at the hands of Belor Hemlock during the raid is downplayed in the AP; I'd like the option to have it happen on the edge of a fight the PCs are on the other end of.
Seeing, either first hand or through after-the-raid evidence that horses and dogs kill goblins would be COOL. Example: Aldern Foxglove is hiding from a goblin, whose companion has been crushed by his horse (which threw him and ran away, or is lamed by a lucky dogslicer hit).
Listing the "Ten Things You Need to Know About Goblins" where the PCs talk to Shalelu would be more helpful than having them outside the adventure entirely. (Although having them in front of the Goblins section of an "adventure bestiary" appendix would be almost as good.)
Copy and cut pages for statistic blocks would help IMMENSELY with the combats.
Rules for fighting a house on fire would be nice, but not story critical. (Although going into a burning house to save a woman's screaming husband, and having her REAL husband ask what he was doing (naked/under-dressed) in their bedroom seems priceless ATM...)
A chance to admire (or want, for example, a stained glass portrait window for the shrine) Kaijutsu glass makes Lonjiku's death important to the PCs, rather than "Oh, another nameless NPC died off screen. Pity, that."
I had other thoughts rummaging around in my head - they'll be back at the surface later.