It could actually be more than that, and remember we would be able to do a full unattended backup, with no additional intervention. That would be a big plus.
As it is now, we first run dvd-decrypter, wait around for 20 mins or so, then activate dvd2one and point to the dirs we just created, then wait another 20 mins, and then finally maybe activate NERO (or copytodvd launches automatically if we have it setup). I am sure you can see that this requires a fair amount of user intervention.
Not to mention it would become a lot more 'user friendly', no chance of making any errors with configuring dvd-decrypter (multi-angles etc).