I am not going to ask things that are impossible or very hard to implement (such as converting a morph into a wall, makes no sense to me, hard to implement and would bring lots of troubles), anyways:
1. The 4 Basic NURBS operations with morph profiles\surfaces: Sweep, Loft, Shell and Surface. Remove Tube function because it's too unusable, I would replace it with a real Sweep.
2. A real tool for railings. Railings along a morph path: so we can finally place railings on any ramp..
3. Convert a shell to a curtain wall, and so:
4. Triangulated curtain walls.
5. SEO operations on walls appear in plan.
I love the software, really, it keeps my mind clean and ordered. Keep it simple!