Just installed the update but haven't tested it yet. I sure hope they also fixed the low volume issue over Bluetooth.
Edit* just played with it a little. Either this is a new feature or I never noticed it before but ringer volume settings and Moto Voice volume setting are separate. So if you do a search using Moto Voice, for example, ask what time it is, the volume control, using the rocker, controls Moto Voice volume while it is on the searched screen (showing the time through Google). Sorry if this is an old feature but I just noticed it now for first time and I really like it. Maybe this fixed the low volume level through Bluetooth. I'll test more with my Moto Hint and car Bluetooth and report back.
Yes the volume does revert back to your last setting (I tested with no volume for ringer), however, the priority level doesn't stay. In other words, I set my priority level to "NONE" and after performing the Moto Voice search, it switched my priority to "All" but left my phone on vibrate. Would be nice if it can revert back to the volume setting and the volume priority level setting.
Edit 2* So it does keep the "Priority" level setting and leaves it on vibrate in that mode. Would be nice if it can retain the "None" setting as well. I'm sure there's a reason for this but I'm not sure what it is yet.