I did hear that vehicles would go through alot of changes, such as being able to 'pimp up', Rocket said during an interveiw that they were thinking of even customizing cars with guns, and most of the developers were talking about a 'battle bus'. As for the keys idea, i also disagreed on that topic but i beleive that there could/should be a way top protect your vehicles better. And you prove a valid point there Dancing.Russian.Man, but it would still be really cool to dive underwater ( maybe you'd have to find the necesary equipment), and maybe you could loot shipwrecks or such.