If he really ran the tank dry by forgetting to interchange tanks, they should ground the man for ever. Not only does it pull down the reputation and standards of pilots from SA (again!) but raptures nonscheduled 210 flights even further.
The first thing that comes to mind on engine starvation is to switch tanks immediatly, check mixture, boost pump on, magnetos - if windmilling doesn't start it: use the starter... bla bla - would be interesting to know from the pax if he even attempted to restart. Even with Vapour in the lines-with boost pump and medium throttle setting it should of worked if 500ft AGL or more were maintained.
I don't know but IMHO seems both accidents that involved the Atlantic Aviation/ Pleasure Flights group, where due to serious pilot errors. The production of this aircraft was discontinued as the company was being sued because many private pilots in the States were too incompetent to handle it. The C210 curse over Namibia is probably there to stay if people involved will not wake up. I believe it is not the aircrafts fault.