I'm with you on this one. I too would like the bars to be flatter and its not a matter of the height as this has no effect on the angle. The solution that I'm looking att is the MV Motorad product from Germany...
I really like the idea but I'm not so happy about the visibility of the wires. I have been looking at various light designs to see if I can incorporate them into the actual mirror shell, but there is still the problem of the wires.
I'm thinking to bore a small hole up through one of the two...
I've been thinking along similar lines, and also to have the back of the mirror as a second indicator, as some bikes already have, but I can't find a lens that fits the shape. If you find something that looks good, then please let the forum know.