.Mac. said:
Anyway, imagine if Kershner returned to do ROTJ following after his successful ESB...
I highly doubt ROTJ would be much different film in its core. After all it was still Lucas who was creative director behind ESB and ROTJ.
But now that Lucas isn't actively involved any more, the films could be quite different with different director. So in this respect I agree with you that it might be better to keep one director throughout the ST, if EP7 doesn't suck of course.