As to your first question, Madman may choose to add this feature at some point, but you might be better served by searching for a Client-side Mod that can provide this option. Personally, I'm a fan of "Extra HUD", but the one thing it doesn't provide is on-screen coordinates. Go figure!
Here's a link if you'd like to check out that mod:
https://www.nexusmods.com/7daystodie/mods/60I have no idea about a vehicle map, although it'd be awesome! Maybe we'll get lucky and it will show up in A17. Then again, maybe that would be the advantage of vehicles with passengers (they can check the map for you)... it certainly would add an interesting level of immersion!