Attach copper shapes to a net - I have worked on several commercial designs that called for circular tracks. The only solution at the moment is to create a circle on the copper layer and then tell the interactive router to ignore DRC violations. Unfortunatly this makes it impossible to do a proper DRC check on the finished board. It would be much better if copper chapes could be added to a net, orfailing that if there could be a special arc and circle track type that lets you control the centre position of the arc.
Aluminium PCB’s in the board stackup - I can’t see any way of doing aluminium backed PCB’s with the current board stackup settings …
Extending the library system to schematic layouts and meta footprints - The hierarchical schematic system is just begging to be formalised into a schematic library system alongside a PCB layout library. I don’t know about other people but I frequently re-use sub units in PCB designs, including PCB layouts (For example for switching regulators or power driver stages) It would be great if you could have schematic layouts in a library system, and link them to PCB layouts in another library - just like how comnponents can link to footprints.
Parametric layout - Parametric driven layouts would also be great, but I realise that its probably a big development goal. Perhaps there could be a compromise step where component layouts can be read from a table, which in turn could be read from a spreadsheet or csv file …