What I would look forward to is that some holy programmer would create a spline-based road creation tool that comes close to Cities Skylines, especially junction creation that would support some features like different curvature per junction edge. If you take a look at Tokyo’s neighborhood streets, you will see what I am talking about in terms of reference.
Aside from that, it would be interesting to see a procedural edge-wear tool that would mimic edge-wear processes that we know from substance painter and co.
Why not using Substance Painter and Designer? Because I have to deal with big structures and procedural assets where I just can’t use prebaked edge-wear masks.