What are we talking about here; hi resolution terrain maps or true topographical maps?
This chat is about “Topo maps”, which I think of as maps with zillions of lines, with increased compression of lines to represent terrain heights. I would agree with OP that layering vector map data onto a base map of true Topo map data would not make for a good user experience.
However, if we are talking about layering vector map data over a high resolution terrain map (as per Craig’s suggestion)…well, other apps already do that and there is no clutter. I look for a terrain option for the Vector Map every very time there is a new iFly release, and I am disappointed it isn’t there.
So, +1 to Craig’s suggestion so long as it’s for terrain but not Topo maps.