This is a solid test of the armor as it stands alone while following the "this game is based on SOs" concept so heavily pushed by some. It is valuable in that it shows us a solid comparison between the armors. Nothing more, nothing less, and I think @Galaxy Braindid that quite intentionally.
Now he's adding in some pools which I think is a solid plan. @Werner's addition of the unique IOs is also a great place to get some good balance notes from. Damnation knows I use the hell out of all of them as soon as I'm able to slot 'em.
Yes, adding in a secondary's mitigation will at some point be useful as all hell as well. We've already seen how well claws does when you slap that KB--KD proc in shockwave and go to town with it. Knockdown is AMAZEBALLS for extra mitigation while not screwing up damage output. But we can get to that later. For now, I'm fully on board diggin in the dirt to take a good look at just the primary Tank armors and see what's what.
Total side note: It's threads like this that keep me coming back to the forums. There's no BS, no dev toadie yesmen, no crap goin on, just folks who like the numbers and the study. It's all good shit.