1.) I've done multiple runs since the release of 1.24, and I have yet to see more than two harpy spawns to get bird lover (3). It's been nothing but dryads with exactly two harpy spawns.

2.) The Puca/rabbits never came for my debt burdened rear. I went with the thief class to have more food to last longer, but even with that and collecting food as much as possible, they still haven't appeared.

Hey, they should come when your debt is >100 - you can check your debt on the character screen.  We're going to increase the number of spawns of everything in the next release, but we'll also reduce the Bird Lover check to 2 just in case.