Asking you how long you want the tails isn't neccessarily a bad thing.
There is no, "dock to exactly 3.52 inches" rule. I actually think it's good that they ask you that instead of just docking them as they want them. Some breeders prefer them shorter, some longer. That question
alone wouldn't deem this vet as bad, I would think.
I would think you'd want to find someone with more knowledge on the breed--breed specific disease and faults as well.
Good luck!