this is one of my biggest issues with the satnav. After getting my Leaf 5+ years back the only redeeming feature of it's over priced and out of date navigation system is it always gave you Fastest/Shortest/Eco route options as well as the usual avoid motorways and tolls.
This was a bit of a revelation as I saw that sometimes you could completely avoid the motorway, travel down some lovely country roads and only take 5 minutes longer.
I often used the eco route option even if I had plenty of charge to keep clear of the larger congested roads.
Not having this in the Tesla is a big step backwards for me, because I don't want to always be pushed onto dull motorways and dual carriageways. We've got some lovely A and B roads that are FAR more enjoyable, especially in a capable car.