I agree that Bethesda's RPG writing is amateur at best, and I can't dispute that there can be some good points in Dishonored. But at least for me, a mark of bad writing is that I find myself unable to care about the outcome for any of the characters in a story, and in Dishonored, I personally didn't care much about any of the character's struggles or personalities, as they were all pretty one-note. I can't recall a single character's name from Dishonored except for Corvo, since I found it novel to hear Stephen Russell as a main character again (big Thief fan, which incidentally I would point to as a game with excellent writing).

There was one instance in the main base/hub of dishonored 1, where there's a short excerpt of a story about a whaler in a book, I think in the room where Emily was supposed to chill out in. I thought the writing of that little short story was so compelling, I sat back in my chair after I finished it and thought "Why isn't this game about that?", because I felt it highlighted how boilerplate the actual game's story was in comparison. So in that way you're right, the micro-writing, the world building, the atmosphere, is all top notch. I just wish the characters and plot were able to match it, as then it would be a masterpiece.

I should mention that I'm pretty difficult to impress with writing in video games, as I don't think most of them can compare to the quality of writing available in books except for a handful of examples such as Thief, Gemini Rue, Mafia, and the original Deus Ex.