I think this would solve a lot of problems.
For instance, I have a tendency to experience anxiety. My DC therefore both inherit my anxiety genes and also learn from my anxious behaviours (even if I try to minimise this) - a double whammy. If they had been reallocated to someone else, and I had been allocated someone else's biological DC (perhaps with a genetic tendency to feel angry, say; something I suffer less often), this might potentially all get ironed out.
OK, so there are some potential problems with the scheme. But AIBU to think it might have its advantages?