Well, I'm a big proponent of doing it your own way. As we've already discussed there are many nuances that you can juggle and still get fine results.
That being said, there's a lot of his spec I'd be critical of. Corpse Explosion is pretty well out of place, I assume he means it for more AOE threat, but at the expense of Dancing Rune Weapon? I wouldn't make that choice. I would sooner get Bladed Armor and Will of the Necropolis (I've been testing, it has a lot of synergy with the Blood tanking nuances), than Viscious Strikes, Death Rune Mastery, and Epidemic.
The build has some synergies, I can see what he's going for, so I wouldn't peg him as a poor or short-sighted DK, though I would expect his tanking spec wouldn't be so strong.
As for the avoidance, that doesn't sound too far off, though I think he rounded up 5-10% for t7 gear. I wasn't in full t7 but I did have a good 25% parry and 20% or so dodge with my tanking runes and all. Maybe he was counting with keeping Blade Barrier up.