I can imagine ways to cover the raised edges, but if the fixes aren't cosmetically desired or wanted by the community then there wouldn't be a point. If they were to do an interest check of possible configurations with the community they could gauge all of these inputs. Does the FC660C share the same issues, could it use the same case?
If color is an option, please request a black or gray case. The only cases I know of for the FC660M are the blue/red/white/champagne ones. The black plastic ones are really hard to come by and mine is getting shiny in some places.