The donor shock loss can always happen in any patient at any clinic. It depends on patient's donor too. But its temporary and it recovers after 6-8 months. So i dont think that is a problem. In general you always judge the donor at the end, not in the start which is in the healling process. With more grafts it takes more time to heal, but its ok at the end.
well, I dont think 4950 grafts is too intense since other doctors extract even more grafts in one session. For example dr pittela extracts about 6500 grafts in just one day and even 12500 grafts in a 2 day session.