From what i've seen same goes for shield, which is quite annoying since there's already not much choice for those.

Lominsan Lantern
Block Rate: 126
Block: 86 Attack Power: +15

Gridanian Buckler
Block Rate: 168
Block: 71 Evasion: +15

Ul'dahn Hoplon
Block Rate: 131
Block: 107 Dexterity: +2

Of course I joined the Maelstrom. Hellooo crappy shield !
Too bad, the updates on GC were pretty cool besides that.