First off, the newest changes:
Shield Wall, Recklessness and Retaliation all moved to a 5 minute timer, 12s duration. Shield Wall is now 50% instead of 75% and Recklessness now has a limited number of charges (and only effects yellow damage), but uh... Arenas are going to be intriguing.
Impale moved down to tier 3 and is now the prereq for Deep Wounds, also on Tier 3. Deep Wounds moved to a 6s duration for 48% weapon damage instead of 12s for 60%, which is a net boost of 60% damage when it's active but hurts Deep Wounds uptime somewhat (and PvP, for that matter, although since Rend is becoming good this isn't as bad as it might be).
Unrelenting Assault (-1/2/3s CD on Overpower/Revenge) swapped places with Deep Wounds, which means if you want the debuff you still need a deep Arms warrior.
New ability added to replace Bloodbath;
Enraged Assault (NYI)
75 A furious assault that consumes an Enrage effect on the warrior and attacks with all weapons. Can only be used while Enraged.
15 Rage, 5 yd range, Instant
Enrage effects include Enrage (obviously), but also Berserker Rage and Bloodrage. I like this one, personally, although it's NYI so it's hard to get a feel for how effective it is in normal use.
Now, for my impressions having played earlier today (before these changes went in)...
Titan's Grip is amazingly cool. It also sucks, horribly, in terms of damage output. It is 100% not worth using right now except for grins. Similarly, Heroic Leap is cool-but-useless; the aiming function is awful, it has some... interesting features (requires a target and a path to the target, but does not actually move you _towards_ the target) and is capable of missing stationary targets, which is just dumb. If you use it on a target in water you go all the way to the bottom as well, and at an angle; I had to spirit rez after using it in Howling Fjord since it took me down past the point where I started getting exhaustion.
Haven't tested Arms of Prot yet, was starting to when the servers went down.