Flat leaf springs?

Are the leaf springs in the 3rd gen TRD OR all this flat? I hadn't noticed before but was under the truck earlier. Just seems odd, but is that just how they are made? I was just figuring there would be a bit more curve without a load.

 

Mine are almost a negative arch , the spring is almost collapsing over the axle.

 

Huh that just seems really strange to me.

 

I am very disappointed with the rear leaf springs in my 2017 TRD Sport DCLB. I have a Leer 180 canopy, bed mat and a few tools in the back and the truck now sits with 2" from the top of the bump stop to the frame. I stopped at the stealership yesterday and measure a new one and it had 3.75" (unloaded). It's a truck?!! Here's the kicker, on the way home from Costco I drove over the scales and it is 40kg (100 lbs) over GVW, with aforementioned load and $170 worth of groceries in the back. WTF?
I guess my next move will be new leafs as I'm not sold on the air bag idea.