I don't own a FJ, but they are great vehicles and I see them a lot at work. I would have bought a FJ had I not needed a slightly larger SUV and was poisoned by my experience with a S10 Blazer with a pathetic 4.3L (I swore off everything less than 8 cylinders in anything I bought mid-sized SUV and up.)
The bumper design looks great, very sturdy and well thought out. I like the way your recovery brackets on the front look, like a giant carbiner or something was melded into the bumper. Though I do have to admit I have some hesitance about it.
This is my personal taste here and not a critique of your abilities or design, but as a fan of the FJ's unique look. It has grown a soft spot in my heart. But this reminds me a lot of the 4th Gen front bumpers. I would be interested to see a sort of streamlined version of the FJ's existing funky bumper with winglets incorporated into the design.
Again, this is just a personal opinion from someone who admires the FJs for their unique take on design. I personally would want to preserve that if I were making a product specific to that model as much as I would retain a certain design style for parts for my 4Runner. Hope that helps in some way!