I started Skyrim on xbox. Due to my constant frustration with bugs I purchased The game on PC shortly after the release of Dawnguard. My level 60 plus battlemage on xbox was plagued by bugs such as unable to start thieves guild quest line, unable to start the murder investigation quest that eventually leads to being rewarded a home, Unable to we'd certain NPCs because I spoke to them out of order or something like that. Have any of these issues been addressed. The game and quest lines all run perfect on PC. I would hate to go back to a bugged Xbox game just to play Dragonborn.

yeah i had the same problems on my xbox

Any quest that you started and bugged out on. Will NOT be fixed by any patch. You will have to go back BEFORE you ever triggered that quest to begin. This is why I always just restart a new character with every patch.

Besides Dragonborn is just a DLC it actually fixes nothing. All fixes are implemented through patches.

Many of the old bugs have been fixed. But not all (i would like to say most however, since me myself never seem to run into one).

Do note, that many (if not all) of the fixes require a fresh save, so your old save is most likely still bugged to bits.