It's not like they pretty much gave away with a massive new twist that they are making a sequel in the second part of the dlc or anything.....
The base game and the DLC are super-sequel-centric, but I could reel off a dozen games and movies which did the same and never got to follow their logical conclusion due to under-performance.
That said, TEW2 probably has a good chance of existing. We've never had solid numbers for it afaik, but it sold strongly at launch and by all accounts Bethesda was very happy with its performance. Here's hoping.
is not that they butchered, they needed dynamic lighnight, something that idtech5 didnt support very well, and they implemented, as far as i remember
Yep. They wanted a very specific look for TEW, and idtech, the only engine they realistically had access to, had to bend over backwards to accommodate it because it just simply wasn't designed to do the things TEW is doing. As a result, it occasionally suffers with framerate and some minor glitches. The game looks really, really good for the most part though.