I think the Blue Jays do a pretty good job with their "systems" don't you? Their IFA development has been really impressive since AA has took over and Vancouver has been very sucessful at the minor league level, but I do agree that an additional guy can't be a bad thing considering its Beeston who he is replacing.
I just hope DD (if he does come, all be it while not giving up anyone significant) has an open mind and doesn't try to change things for the sake of change when there is already successful systems put in place.