Tools for making top and side views match each other has crossed my mind, too! Please give some thought to how such a tool might work. Maybe draw guides at some selected art’s horizontal and vertical extents?
Others have suggested a grid, also, but I really don’t see a lot of value in duplicating CADtools’ features, for a number of reasons. There are a lot of new features to create first! That said, what do you think of the idea of snapping art along an axonometric grid as it’s moved or created?
Applying AxoTools to perspective is a definite possibility, something Ron and I plan to explore in the near future.