If prefabs are blueprints, blueprints need more features

[starseeker]

@Tim Sweeney;169239

We’re brainstorming on all of this and are improving the system over time. Conceptually, Class Blueprint = Prefab + Visual Programming, in analogy to C++ Class = Prefab + Code. We need to improve support for persistent instance customization, based on some notion of how instance properties are customized relative to their parent and therefore behave properly as they or their parent are updated. We also need a more systematic approach to creating a Class Blueprint from actors, components and level blueprint nodes.

One of the issue I have with BP prefab is that it cannot combine sub BP Prefabs. Not in the component editor anyway.
if I have a car, & the car is made up of body & 4 wheels. A wheel is an assembly of tires, wheelhub & 5 nuts.
The standard thing to do in a CAD or 3D package is, make a sub wheel assembly (tires, wheelhub, nuts), then make 4 insatnce of it, & attach it to the carbody

So if I made a BP called wheelAssembly, I will NOT be able to assembly this to my CarBP, not via the component editor which is the natural thing to do. Instead, I have to use the construction script & ke in coordinate etc. Thats just not the natural way to do things. This is coming from an experience engineer (day job) that made mechanical assemblies design.