In addition to rule revisions, A number of command cards have been Officially revised.
At some point, pretty new command cards will go up, but at the moment I have made a .pdf file which contains all of the new cards in a rather mundane form. You all can download it here
In all cases, there is one proxy per card in the respective faction's deck, so just download this file once and, assuming your command cards are sleeved, just the proxies on top of the current corresponding cards and you're all set!
Here are the cards which were changed and the reasons why:
Hawkshold Attack Formation: a
Hawkshold Defensive Formation: a
Hawkshold The Plan: b
Orc Frenzy: a, c
Orc Battle Lust: b, d, e
Orc Rampage: b, d
Undead Flesh Rot: f
Undead Vampirism: f
Undead Wave of Terror: b, e
Lizardmen Saurian Fury: a
Dark Elf Arrogant Spite: g
Dwarf Rune of the Warrior: a
Dwarf Rune of Skill: a
Dwarf Rune of Power: a
a = These had been too weak; faction cards should be at least as good as generic cards (e.g. Might).
b = These now are no longer "dead cards" in certain games.
c = Better flavor.
d = Pitching a card rather than using a command action allows the card to be played on the opponent turn, and reflects what was done later with the Umenzi Devosion of Endurance.
e = These no longer get stupidly overpowered when played in a massive (3000+ point) game.
f = The Undead needed some help with their attack skill, as their only skill-6 unit is the 500-something point Death Knights.
g = This fix happened last year, and is included in the .pdf for your convenience. The card had previously been overpowered by wording which had not matched the designer's intent.
Players are certainly welcome to continue to use the printed cards, though anyone going to a tournament should expect to see the new ones, and in general the new cards should make for a more balanced, fun game.
One other thing: It's also possible that one or two other cards will change in the near-to-intermediate future...or maybe not.