Blocking DOES work, this is taken from patch info word-for-word:

"Block lock' has been eliminated. When a player character has just
blocked an attack, the player cannot block again for a short period of
time, the length of which increases as Blocking speed increases."

They just made it suck. I would almost recommend shieldless for PvP now, BUT, no point considering they killed Life Leech in PvP. My pally leeched *4* life from my friend with 30% LL and 1k+ damage. No mana was leeched either.

PvP as ANYONE knows it is now shot. Your builds no longer work, and no real way of levelling fast enuff to re-tool.