A8 for example, often has soft close doors but I'd rather not. Reasons : passenger confusion, likely damage to mechanism, finger crushing risk possibly.

Is it easily disabled in the software and then, will the doors operate just like unassisted doors ?

You'd be better buying an a8 without it as I believe it's an option depending on year abd engine. I don't think disabiling it would work as I think the door mechanism are slightly different from soft close verse non soft close. 

"According to my 2012 A8 brochure, I know your car is a 2014. Soft close doors were an option on the 3.0t A8s, but standard on the 4.2 & W12 A8s.

The soft close doors are part of the Convenience Package.

Convenience Package:
Audi advanced key—keyless start, stop and entry; parking system with front and rear sensors; power soft-closing doors; and power trunk open/close"