My understanding is that bluetooth is slow. Slow to react on all information and logs. There is a lot of talk about bluetooth as a means for external tuning on many forums and even on the nistune boards. but most said that it is just too slow to use. Adaptive tuner is also slow while using bluetooth so most try and use a host capable tablet or phone.
I have not used bluetooth for tuning or anything other than phone and data use, so i dont have any first world experience.