Ever since the beginning of updates for Skyrim, since the High Res Texture Pack DLC, Bethesda has released broken DLC, which have never been updated with fixes the community has brought into attention.

For example, the HD Pack. It was badly packaged, to the extent that many textures were not updated due to bad file and folder naming. Some of the textures made the game worse, such as the famous purple log. Even once pointed out, having a full anolysis done, after having mods which fixed all the problems, Bethesda never updated the DLC, leaving all who download it at the mercy of its bugs, unless the magically decide to look for a mod to fix it.

Dawnguard. A massive DLC, in my opinion really awesome. Once again, big bugs never fixed. Due to the file being unclean the option to buy a certain aspect of Breezehome was broken, which creates a money sink. Alongside this, the unclean nature of the file causes crashes with many mods.

Hearthfire so far seems to have no glaring bugs, but the file is still unclean which causes many issues and crashes with mods.

Finally, the Update.esm file is highly unclean, once again causing issues and crashes with mods.

Before I go on, don’t say mods are unsupported or something so this isn’t an issue. The moment the Steam Workshop was launched for Skyrim mods become an important aspect.

What can be done to rectify this problem is first for the High Res Texture Pack to be updated with fixes presented in the two main mods that bring forth the issues:

• HD Textures DLC Fix (most important) by Hionimi and krist2
  
• HighResTexturePack DLC Tweaks (still important) by Eiwyn

The next fix is to clean the ESMs of the DLC. This means undeleting and instead disabling deleted records and removing identical to Skyrim.esm edits. Reupload the DLCs to the Skyrim Workshop as an update or something. The most important is fixing the HD DLC, but cleaning is still equally important. This is an issue Bethesda needs to sort out.

The issue here is that mods are unsupported by bethesda in the way that they cannot and will not adjust their DLC to fit any of the mods out there. If they were to do so they would had to do it for all and that would be one insane job. SO to fix issues between mods and officil DLC this falls on the community itself. They gave us to their tools to make mods, but the community also must make sure mods works with the DLC. When it comes to bugs in the official DLC bethesda hasn't ever been fast on fixing those, usually those has been fixed by the community also.

Bethesda cannot take exisitng works already mad ein mods and use in official fixes either, that would be unethical to take other works and include it. If they were given permission from the creator then sure enough, otherwise they can't just make quickfix by using things modders have created.

about cleaning the esm's we know have the tesVedit which does a awesome job at that. so all in all the community has sorted these issues out. If people don't ue mods they most likely will never see the problems potentially caused by mods either.