This sort of a developer is dangerous to have developing Bitcoin's internal structures. I think it's better they stay away.
Which sort of developer? The one who revels in complexity, as though complexity breeds integrity? This guy is surely already busy on his first implementation of Bitcoin, in assembly language. He'll be done by 2017, assuming the architecture he's developing for is still popular enough that people will be able to run it.
Or do you mean the one who walks away? And this benefits bitcoin because the fewer clients, the better?
No, the developer you described clearly has no patience to test his code so that it works properly. We're better off without such developers.