Great job dekuNukem!
Yes, you will be able to sniff bluetooth packets.
Using the bluetooth packet logger coming with Xcode, for Joycon(R) I got :
For CENTER/Release:
[L2CAP RECEIVE] Channel ID: 0x0041 Length: 0x000D (13) [ A1 3F 00 00 08 00 80 00 80 00 80 00 80 ]
For UP:
[L2CAP...