I agree that any Luger with historical provenance should be left alone. I do not agree that Thor's works are 'restorations'. They are not. They are beautification projects. Fantasy Lugers, if you like. No production P08 ever looked as good as Thor's works. I doubt if any commercial Lugers looked as good.
But Thor's not taking the guns back to what they were when they left the factory. They're better.
Some don't want better. Some want historical perspective. Following the life of the individual weapon. Maybe it was a bring-back and it's history stopped there. Maybe it went on to become a second-string backup to other more modern arms. Maybe it went to a desperate Mediterranean country who took any arms it could get.
I think it all depends on the present owner. I have several refinished Lugers. And I have two in their original 'unrestored' condition. I like them all.