Dive planes and rudders, and a proper diving simulation - yes, by all means. Everything else, I'd prefer not to have development time spent on this. Much rather on the other vital stuff like good damage model / sinking mechanics, AI, wolfpacks, proper 3D model of the early Type VIIC, etc....
I find this very similar to the good old 'clickable cockpits' discussion about Oleg's SoW.
