I'm not sure if I fully understand what ROPS will do. It will say "runway too short", and then you step much harder on the brakes and select full reverse? Or will it tell you to go around before that?
edit - I found the answer here:
http://www2.icao.int/en/GRSS2011/Doc...e%20Lelaie.pdf
looks like a simple and good idea, to add an extra layer of safety