It's possible. Maybe the figured out what went so wrong with DG that they won't make the same mistake with Hearthfire.
One can only hope though. You can just hope they approached Hearthfire a different way then they did DG.
If they figured out what went wrong with DG, it would be here by now.
The mistake is not within the DLC, it's within the ported version itself. It's such a mediocre-at-best port because the game is focused on XBox's capabilities, and not PS3's. Both consoles have their advantages and disadvantages, and that's why ports are almost always bad news, but there are a few companies that get it right now matter what: like Rockstar.