Natively? I tried Rap Dialer and a few others, didn't care for it. And voice command doesn't work reliably enough to be the primary means for making calls.
from ur steps im guessing u don't have people hub pinned to the home screen? because thats what the address book button takes u to, and if u know who u want to call u can tap the alphabet to bring up a alphabet shortcut that takes u to where that contact should be (ie. A for Andy)
but thats really for the less used contacts, for contacts you often use u can create groups then pin it to the home screen, and for contacts u call constantly u can pin them directly to the home screen
[EDIT]
just thought id add these too
"-Erratic 'back' button behavior. Not sure if this is a bug, or just poor design but I noticed if an app is in the background for awhile and then you resume it, hitting back will CLOSE the app instead of going back to the previous menu. Maddening, to say the least."
this doesn't happen to me and from what i observed alot of people actually mistake a left/right swipe as switching menu, which it isn't, so it seems like u are "backing" to the previous menu where it actually should have been a left/right swipe... just guessing though since i didn't see u do it
i don't use fb app so i can't tell u much, the people hub is more than enough for me
the rest i don't know, bluetooth works fine with my car so im not sure what the issue ur car's bluetooth is, i did read news that there is a patch coming in the next few days that will fix some of those issues
VPN i just heard that it's coming, no sure when though