(I did tell you this was an avalanche)
This shirt pattern had so much to recommend it: the cool twist, the interesting sleeve construction, the simplicity. But in the end I can’t see wearing it much.
The fabric is a lightweight rayon/spandex jersey that is super soft and drapes beautifully.
I can’t comment on Burda’s instructions, since per usual, I didn’t look at them. It wasn’t hard to put together, though, and wouldn’t take more than an hour if you have a serger. No bands so the edges are all hemmed.

And it does look pretty neat when you first put it on, but here’s the problem:

As soon as I move my arms, the neckline bunches up.

You either need to accept it as a gathered cowl-like neckline, or be constantly pulling it back to where it’s supposed to be. But it doesn’t stay put.
Sizing Note
Standard for me with Burda: Traced out a 38 grading to a 40 at the hips with an FBA in the front (and that was a fun time with this pattern). Overall fine, though I did end up taking it in a bit through the sleeves to get them to stay up when I rolled them up.
Although I liked the look on the model, the twist and pull gave me an itch just thinking about it. You’ve reinforced my hesitation. However, your bodice looks way longer in proportion to your body than the model. It looks like you could do with shortening it, which could reduce cowl problems, it may be you’ve used a fabric witb more vertical stretch than the pattern is designed for.