BeamNG has come a long way from how it used to be a few years ago, they have kept up on all of there content and regular updates and contributes to the community. But! shall we talk about the next update! In my opinion i think the next update should be big, but not humungus on memory, i mean huge as the amount of extra physics and awesome things they put in, for example i would like them to make it able for mud to actually be flung and stick to the car slowly covering in- and weighing it down. and when you drive on dirt roads your car gets covered in dust, but the only way for you to clean it off is to realistically go into the water. And why not talk about weather systems ? what do you guys think about that, for example rain then turns to sun, like adding in actual weather but not through a mod. Or what new awesome cars should they bring in you decide tell me what you think, this is just my opinion and what i think they should do.
If you would like to speculate about the new upcoming update, there is a thread dedicated to that. I suggest checking it out. Also if you want to make suggestions about what should be added next, check out 'Ideas and Suggestions'. Anyways, these are great ideas that you suggested, but post them in Ideas and Suggestions so that the devs can see them.
Some of this stuff would be really hard to do like visible dirt, but it's probably possible. Weather systems might be coming sometime.
We already have some maps with "Weather" but you cannot control it. As of mud flicking up and sticking to paint, that would be very hard on low budget computers like my shit box although I would not mind it if you were able to turn it on and off. And I think that their main purpose for beamng is to demonstrate what proper soft-body physics engines can do.