If MINI have fully repaired the car under warranty then it wont affect the value anymore than it would have done had the fault not happened.
When you say compensation do you mean you had to make your own arrangements for a car whilst they were repairing yours?
If they gave you a loan car to use for the duration, which is only right they should, then I dont think you can expect anything more.
I doubt very very much they would give you a new replacement because of this, maybe if the same exact fault was to occur again then it could be considered.
Ive never heard of a driveshaft coming apart before on a new MINI, so its probably a one off event, something never tightened up properly perhaps?