Here's what I was looking for that I didn't see: an indication that David Radcliff regretted being in the flames.
Same here. Although one could suppose that Laura's mystical hold over DR was so strong that, even in the afterlife, her son was incapable of escaping it. However, as Magnus points out:
What we can read into all this is that DR didn't go off to wonderful Phoenixland as a result of the flames, or he probably wouldn't have been a ghost obsessing on the burning.
I agree. Which to me, frankly, makes Laura an even more wretched piece of work. Despite the outward appearance of maternal love, she's merely concerned with achieving her goal, which benefits her alone. I think there was a missed opportunity in explaining why taking her children with her was so important. On the one hand, if she was pure evil, were the children a sacrifice to ensure her continued supernatural existence? If, however, the children end up in a fabulous paradise, it would have been interesting to see some internal conflict on Laura's part, knowing the immolation was a horrible end, but peace was ensured on the other side. That being said, I know she was meant to be a villain, so villain it is. I save myself a headache by avoiding the "what ifs?"
How can DR, a ghost from elsewhere, appear at a seance designed for Josette, occupant of the house, to communicate better?
I wondered the same thing; he has no attachment to the house. Perhaps because Laura was in the general vicinity and had previously been in the Old House, he was able to make a brief appearance?