Well, I would suggest everyone to make a single ticket and make Blizzard aware of this. Tell them, that you would like to see vehicles work like a normal character. So they'll be able to follow, focus, assist etc ..

Maybe you can make them aware of the "disappear" when we move into phased content aswell! I've done both, and it's most likely just a matter of the amount complaining before they change it - at least we can hope