Thanks for the supporting comments :)
Very good point and very true! Indeed, aside from the high speed passenger train (which I'm still having issues with) the view is very obstructed from most the train engine cabs.. This is down to the camera's FOV and fixed position.
As I progress towards a playable demo, I will address gameplay aspects such as this. One idea is to have a free camera (zoomable) contained within the cab, but I'll probably go with toggling between interior and exterior fixed/free cameras. I'll have to keep this simple considering this game is aimed primarily at children.
As a sort of side note, I am hoping a product such as this will help engage the consumers of these products and the Train sub-theme in TLG's eyes. I know it's a bit "pie in the sky" at the moment, but it is hoped that if it can raise awareness and interest, then maybe TLG will support the sub-theme better with more intermediate sets or better yet, realise the Trains theme once again as its own theme. Wishful thinking I know, but I am going to try :)
I am looking for help from this community and not just for technical stuff. I want ideas and suggestions, maybe even someone who wants to help me model this stuff in 3D! If you can help or want to advise, then comment here and I'll arrange us some Google Doc's/Drive space :)