Godot 3 may have little changes everywhere and 3D will get a lot better, basic stuff will stay there, scripts will get improvements also shader language.
If current 3D status of Godot is enough for you, you can work with it and wait until 3.1 where worst 3.0 bugs may be fixed and some porting tutorials/scripts will be around too (plain X.0 stable versions use to be risky for production).