WP 8.1 Bluetooth concerns

With the DP of WP 8.1 I've noticed a few issues with Bluetooth connections. Particularly with my Bluetooth car stereo.

1. Here maps navigation seems to now use a low quality Bluetooth profile for speaking. It seems to take a few seconds to establish this connection which causes me to miss the first part of the direction instruction. Same thing with reading text messages

2. Cortana is really loud and scratchy over the Bluetooth stereo connection.

3. Custom Bluetooth volume settings don't persist phone restarts.

Anyone else notice these issues. I hope the final Nokia driver updates help with this when released for my 920.