personally i think it adds a unique and interesting dynamic to the game to have the interpersonal story line to the game.
think of it this way.
Go play the original Medal of Honor
then
Go play Brothers in Arms...
in BIA the cut scenes tell the story of various characters, though both games deal with WW2 combat, brothers in arms is clearly the superior game... not because of interface, not because of graphics, but because the ENTIRE outlook and concept of the game is revolutionized.
When a character in MOH gets his head blown off... i could give a damn.
When a character in BIA steps on a land mine, there is a moment of reminiscence, a feeling of loss... a connection that other games of the genre dont offer.
hopefully, this is the effect we see on the SH series.
i know for a lot of you, driving a sub from waypoitn to waypoint on a map and attacking ships is all its about.
but i genuinely think that this whole RPG element could take the SH series to a whole other level of greatness.