I'm in Florida so it's all flat. I'll shift into 6th on the interstate at 70-72 mph and my RPM's will be around 2000. Running 35's on a 2.3. Fuel mileage isn't a concern as it's not my daily.
I installed a 4 door Badlands suspension on my 2 door (non-sas) base. It now sits a little higher than a sas version and is pretty close to level sitting on 35"s.
Mine (2023) came absent switches as well which was the only option I ordered. Was going to go the OEM install route but at the time Ford couldn't get the fuse box replacement part so I went with an aftermarket solution. Easy install and around $400 if I remember correctly.
I'm not going to hijack the OP's thread but it's a different product that is very well made and sturdy. Very satisfied. It is steel and it's 46 x 39 so I can use the full size of the area. It slides in and out with ease can't speak to the slide orientation as I didn't design it plus it makes no...
I installed Badlands non sas 4 door 2.7 suspension on my 2 door base. With the 315 BFG KO2's I'm sitting 1" higher than a stock SAS. No noticeable ride difference.