This is true. However -3% spell hit on you is as situational (as far as I can see) as 30% more block on shield (Also there's the added bonus of more armour for me and my party).
I've also learnt not to sniff at +movement speed when tanking things like Al'ar's embers if I'm unlucky enough to get a flame patch under me or healers pull aggro from fresh embers and they're across the other side of the room.
To each their own with things like that I guess.
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