I'm rating it a 4 right now because I have not driven it yet. But I wanted to express the opinion that you should leave the elevation changes. As a young racer, I spent a lot of time on the local streets. Steep elevations forced you to slow down if you wanted to complete them successfully. I used to call them "straight turns" and for those experienced, they knew what I was referring to. For those that didn't, surprise!!!
So I think you should keep them to retain that IRL road feel to the course. Will let you know when I go to 5 stars, as I'm sure I will. Cheers!