I was also considering adding a third route, though no one seemed to suggest this in the game or mention thetwo routes being a problem, just tha the cap area itself needed changed, so I might hold off on this change for now but remember that I can still turn the disused cablecar building into a route to the middle very easily.
A third route may help with spreading out players more (making it seem less cramped) however i reckon that you could possibly make it work with 2 and would be cool if you managed (since most koth maps go with three).