Recapping, the word is out on how Purple Sun works now so no bouncing through an entire battle-line, You can have ethereal Dragons thanks to the Transformation of Kadon and Okkam's Mind Razor DOES modify armour saves.
Though perhaps the most important one isn't the one which allows you to tear up a battle-line with an appropriately equipped Vampire Lord, it is in fact the combat reform rules have been altered so that you don't have to keep the centre of the unit the same when reforming in combat. This was necessary primarily to make the rule work because it just flat out didn't in the last few weeks of playing the game. This allows you to react to threats to your flank or reform to get your diminished horde formation into a good old fashioned 5 wide block unit.
Also Steadfast has been slightly changed to make the wording more clear and so it can now be combined with SiN [Strength in Numbers], rather than using the ambiguous [I say ambiguous because many people interpreted it in a number of different ways] 'unmodified Leadership'.
Good on GW for the fast response, and it can finally put some rather heated debates to rest.
Laters