I still think we could be missing something here. The tree density in the shaded area is very high (I know there has been some thinning due to disease) and the path of a wooden coaster and supports is pretty wide. To have decent ride length they would need to decimate a huge area of woodland.
so here's my logic... (I'm going Spock on this)...
I find it difficult to see a woody utilising a huge near terrain drop into the valley only to do little with the gained momentum. John Wardley always talked about efficiency and utilising the speed gained from any drop which is why the pipeline coaster was rejected as SW1. With the exception of Oblivion, Towers coasters make great use of any momentum they incur from even a modest drop (I know about the trim on Thirteen), and in the case of Nemesis in particular to do so much with so little is amazing.
I could be wrong but I'm imagining the 1.7 hectare plot to be longer, but narrower.
I reckon if it drops into the valley, it must do something with the momentum. If they are unable to use the momentum, then I don't see a drop into the valley at all. And we allready have a truly great drop coaster. I'm thinking airtime hills for SW8. Woody's don't need enormous drops for airtime, but where there is a huge drop there is normally a good layout at speed. Furthermore it would not be possible to return to the original elevation following a drop into the valley without assistance ( a second lift hill).
That's why Nemesis's station is about halfway elevated between the highest and lowest points, to give it momentum to get back to the station. But if the station for SW8 is where Ripsaw and Blade are this is way higher than any full or partial drop into the valley.
I don't see a drop into the valley, immediate breaking then return up the hill. I say if it drops into the valley, it does something with the speed, or it does not go into the valley at all. If it does drop into the valley then a long, straight, low path with modest bunny hops taken at speed for airtime would be far less destructive than a tangled, twisted high density path, followed by an immediate return.
Well that's my attempt at going Columbo from the limited information available.
To quote Sherlock Holmes, if we eliminate the impossible, whatever remains, however improbable must be the truth.