IMHO anyone who thinks running a long-term 1 in 3 deployment plot is a good way of looking after the well-being of our people has either never worked such a plot, or has no real interest in a family life. That's not to say I don't have the utmost respect for those personnel of all 3 Services who are working such plots.
As for the Falkands, RAF officers in ground tours do do six month tours (I've done one) for continuity reasons. There are good Service reasons why SAR aircrew do not do six month tours; in addition it is far better for individuals - let's not screw people if we don't have to!!!