I agree with you that Roman Rapids could use some work. Even with a short line, the wait is often ridiculous.
As for the train and the "grade" question, of which I've seen no actual corroboration outside of posts on the Internet (but I'm not saying you're wrong, either), I imagine that where there's a will, there's a way, whether it's changing the grade, rerouting the tracks, or modifying the trains (but I'm not an engineer). The old Drachen Fire spot would be a logical place for a new country and train station, and I'd be quite happy to see this happen.