Last time I checked the Bluetooth and BLE specs were massive documents. That's always a red flag for me. Low level tech like this should be clear, simple, concise and unambiguous. You can add complexity to the layers on top, if you must, if your application demands it. But as it stands the designers of the spec let the complexity escape everywhere.
I worked for a company developing 802.15.3 over a decade ago. It gave me some insight into how these specs are developed. It's a complete shit-show. The company would pay non-technical folks, like relatives of employees or whatever, to attend IEEE meetings so they'd have more votes to skew the process. Technical merits have little to do with what ends up in the spec.