new crew, very experienced.

[Lognoreng]

I started playing some SH4 again, on an american sub, since i spent much time on german ones since the expansion. However, the new crew of my brand new boat out of pearl is loaded with skilled crew, which most of them have specialities. Every engineman are engine spec and so forth, I cannot recruit any more officers (petty or other). I feel its kinda dull to start out with a crew that will remain the same through the game. I'd rather get a fresh crew, and develop them as i go on. I think that is a fun part of the game, to get the crew better the more patrols you go on. Any way to fix/mod this issue?. Not using any mods or anything.