The real question here is finally "what nadeo want us to do"
In valley their is already a "train with his wagons" moving alone the rails you put in your map but they never put it in another environnement. = "Perpetual moving blocks "
You can maybe use the 3D text to do something moving but i dont know "how". "= "Soft" physics blocks that the player's car can interact with, thereby changing its mesh. (you can see it used for the GPS in some maps)"
You can use some textures in the mesh editor that are moving the ones that are used in the "effects" blocs like reactor boost etc etc and make the "texture" move like water for example= "Dynamic mesh blocks which warp and/or change their shape, creating fluid movement".
"Force blocks which affect the car's physics from a distance either naturally, when toggled, or when interacted with. (Ex : Propeller, Explosive barrels, Long range magnets, etc.) ((Conveyor belts would also somewhat fit in here as the block itself applies a force on the car, unlike boosts which only affect the car's acceleration))" = Mediatracker can already make something like that but not the way you intend. TMFL team have even change the gameplay of the stadium car to make drift more under a MTracker Rain
Custom effect blocks (Ex : No release block that would force the player to constantly accelerate.) This exist already.
Dynamic grip blocks (Ex : Road that transforms into ice when toggled) And this too