Well said Jabo.
DAOWAce, while it may make solo'ing on a Disciples of War a bit harder (with the MP Cost Raise for Cure / Sacrifice), the way the game was before was a joke. You can easily run Guildleve Parties or Solo / Duo enemies with No Mages, by just having some of the Disciples of War party members equip a Cure or Sacrifice and get by just fine.
What's the need for a Mage at that point? This adds some class differentiation, just like before this patch today, other classes could map Emulate or Bloodletter and really get some success on the biggest NMs. These changes are making each Class stand out from each other more, and make their skills / spells / abilities more valuable.
Of course, the argument of "well this game is for casuals also!" applies here, too. But there has to be a fine line between the two. Right now, there's *no* need for a Conjurer or Thaumaturge in many parties; you can just equip a couple of their spells on your Marauder / Archer and be done with it; it marginalized many classes, or made most classes feel homogenized in many ways (every class could equip / use almost all the skills from other classes).