Well, its perfectly fine to me. They did put closer to the power stage.
The antenna cable goes directly to the connector. It's 10cm long.
If you are unhappy, you can always open it and put some duty tape on it.
You can see the cable goes a bit below on chassis, there is a line hole all across it.
It would fit the tape perfectly there if you want (if you are looking/want more bluetooth isolation).
Also, you can turn off BT completly (on menu), and only turn on when you will really use it.
I was talking more from a design and manufacturing cost standpoint. I'm not especially concerned from an audibility standpoint and since I don't use Bluetooth the radio is turned off.