The reason why old Westhill was strongly wanted for comeback is it's unique design compared to physics we have today. As it could be driven nearly full speed all the time and cornering with some cars with full speed required some understanding, skill and risks. People loved it that way, and that's why it is constantly asked for a comeback.
Solution would obviously be something similar or better in new shape.
I will be missing Fern Bay corners, where you could do some 2wheeling...
Going back to over 7 years, one more time... it did and still is looking something like this
Edit: To the actual topic, I got interested about if all of those "holes" will be blocked, and as we can see, tracks being updated to modern aspects... Would this mean we would see even further updates? Extensions? Because WE and BL are already at that state, but have left some pieces... even plausible, official configurations.