Oddish:
commenting on your list of Heartfire "bugs"
1. I have not had the game crash when trying to interact with a display case. It opens, it closes-thats about it. I am not a big fan of display cases anyway so I basically ignore it.
2. I have my house built on the Falkreach property.
3.I have not tried (yet) to build on the other two. I got the letter from the courier only on Falkreach. He did not have any clothes on (well, except for "underware"). I did receive a housecarl for the other two though when I walked into the Jarl's quarters in each place. I am not 100 % sure, but I think I am a Thane in all three places.
4. Enemies respawn all over Skyrim. How is that a problem? Well, not very pleasant, I admit, but common. Are you talking about that Pinewatch bandit place in Falkreach? Part of the hype for Hearthfire says you have to protect your home from enemies-at Falkreach house I killed a giant that was lurking around on the side of the house. I paniced and attacked, so I am not real sure but I think he was attacking the house with his club.

5. I do not think that Aventus is adoptable. He did not return to the Orphanage and he does have that large house in Markarth.
MY list (partial):
1.Go outside, it is gray and snowing; turn around to go back to the house and it is a lovely sunny and colorful day. Not necessarily a bad thing, but wierd.
2. Build a small cupboard but get a large dresser + a build choice shows display case for item that is listed to build as tall shelf.
3. The housecarl/stewart continually mines for iron ore in depleted veins (though I understand ore veins do respawn-eventually). If she does get any ore for her efforts, what does she do with it?
An aside: are there any housecarls that don't stand/follow behind you yawning or coughing? I feel like (if I could) turning around and shouting,"for the love of Pete! Go take a nap!!!! How can you sneek up on the bad guy with your buddy following continually coughing. Surely someone hears that (that is, besides me).
4. A larder, a larder, my kingdom for a larder. The kitchen in the Thalmor Embassy has one-I want one, a
functional one, please and thank you.