Phone Booth for high society

I was looking forward to this film. I always give a chance to any movie that sets itself in one location and tries to evolve a plot and dramatic tension. There are key films over the years that have done it well:

12 Angry Men
Rope
Rear Window
Cube
Phone Booth
Fermat's Room
1408
Exam
Buried

And Grand Piano looked set to join the modern single location suspensers like Phone Booth and Buried. An ordinary man in a desperate situation held at the whim of a mad man...

Alas, it just came off as Phone Booth-lite with a high society setting. That's all it is literally. Extremely by-the-numbers and only mildly engaging delivering nothing new or fresh or surprising. It was more like watered down De Palma than peak Hitchcock - which I think it was aiming for.

The most impressive thing about the film was Elijah Wood's piano skills. He's really playing that thing! Everything else was average at best and underwhelming at worst. It just made me want to rewatch Phone Booth - a film that built on its premise well and kept surprising throughout.