Anyone know if blocking mitigation has been increased from 20%?

[aiqa]

I'm pretty sure healing is calculated in the logs to include shields. This means that the big healing number you are seeing for DRK is because TBN's shield is being calculated as healing which makes that number an apples to oranges comparison when comparing it against the passive damage reduced from PLD's block. As for the high number for WAR, that would be from Nascent Flash being used as a mitigation tool in large pulls, which is also not an equivalent point of comparison to use against passive blocking.

You make a good point.
But when looking over a few individual parses from higher ranked warriors Nascent Glint and Shake It Off do not account for 50% of their healing.
Even if you remove those (which I agree makes a lot of sense), the build-in healing on a warrior far outperforms paladin's passive blocking (+ gcd healing you always want to avoid).