By 1 am, I reached this far, and was able to drive it around the living room before going to bed.

I was hoping you would check out this thread TamiyaDan. You were the main guy to convince me to check out this truck. I figured if a true-blue Tamiya fan such as yourself was saying to buy one, there must be something to it, and you were not wrong!
I have never even held in my hands the original or rere bruiser, so I can't compare them to this truck, but I definitely have some opinions here. This build is not for beginners. The manual is not assembly instructions, and while they are nice clear diagrams for the most part, there is a lot assumed and vague. I referred to the tamiya bruiser manual and found pretty much the same.I will say however that every last fastener so far has been there with no shortages or pieces missing. Everything was labeled and tagged correctly but nowhere as neatly organized as the last kit I built which was my B6. From what I found online, the bruiser was not much better.
The steering is a problem for me. The servo placement with the long rod, the sloppy pivot, the behind the axle tie rod----it's all got to go. The front of the frame has a perfect mounting spot for a servo and when I have some time, I will be fabbing up some aluminum mounts to solve this problem. I used a high torque metal gear servo and no servo saver, so it steers with no problem, but it's not scale and it looks like a sloppy mess.
My next complaint would be the shocks. The suspension on these trucks is so stiff, that the shocks are just sort of "along for the ride" anyway, but these seem to really suck. I really liked the scale appearance of them, but they might be the worst shock I've ever felt. Very scratchy/grindy and with no real dampening effect. Not sure how this compares with the Tamiya shocks.
Tamiyadan, I was thinking of removing the skidplate too. It just looks a little more scale without it. Also the "traction bars" that attach from the frame to the rear axle. They don't seem to have any purpose and they rattle a little, so they're also going to be removed.
The plastic is something I would like to mention. The black plastic seems to be abs, but not as hard and brittle feeling as my Blackfoot parts, for instance. The white parts feel more like nylon than abs. Not sure how to tell for sure, but the parts felt nice anyway.
Last thing to note was that my transmitter, a spektrum DX3S, does not have a 3 position auxilliary switch. I set mine up to toggle between 2 hi and 4wd. I didn't see myself ever using 2 lo so this wasn't an issue for me, but someone looking to go the kit route instead of the rtr version, needs to consider this in their choice of transmitters.
Well, I won't be able to get back to the build until this afternoon, so until then, let me know what you all think.