Just to let you all know the debug cam from empire and napoleon is still present meaning you can get as close or far away from your men as you like .
So to unlock it:
Go to
C:\Users\YOURUSERNAME\AppData\Roaming\The Creative Assembly\Shogun2\scripts
And in preferences.script change the line
default_camera_type 1; # default_battle_camera <card32>, default battle camera: 0-totalwar 1-rts 2-debug #
to
default_camera_type 2; # default_battle_camera <card32>, default battle camera: 0-totalwar 1-rts 2-debug #
But if you change any settings ingame the camera will return to default so watch out for that.
On a side note you can set the file to read only to avoid this but that means you cant change settings ingame.