1. No, there is no priority feature (but you could create a Favorites List with your priority channels and include it when scanning the main database...those channels would get "double scanned" making it more likely to catch comms on them.
2. Glad you like Auto Locate...I actually got that one patented. Patent US8090388 - Method and apparatus for determining a geographic location - Google Patents
But, I wouldn't use it to replace GPS. It is good when you land at the airport and don't know the zip code, or are otherwise without a specific location reference handy. But, it narrows your location down to about a 30 mile radius, unlike GPS which nails your location to within a few yards.