The thing is, having a shoulder cam would basically double the amount of work on decoration for us.
The game is done and tweaked 100% for the iso view.

If you take a cool looking spot in the game with a great vista and all with iso view, I can assure you that the game won't look that great at that spot with a camera over the shoulder. The game is not done that way.

Creating appealing environment for iso view is really different than creating appealing stuff for 3rd person/1st person or whatever close to it.