Well one thing that really stood out for me was the way the Devs said they want to throw a lot of mobs at us. So let's think about that statement for a moment. How could you do that without relying on sleepga or other link control measures we use today.
What if the FFXIV battle system is similar to an offensive line in football. The mages could be like a QB. So instead of just magically passing though a body, you would literally block. The closest element of this concept is known as Cover a PLD ability made famous by Cecil in FFIV. WAR and Templar jobs could be adapted to repel waves of mobs too. Depending on your job class, you would be more adept at doing this. Think of the traits we have now. For PLD, we have undead killer. So on undead mobs, PLD's would be extra tough in blocking this threat from their support classes.
I think that parry, guard, and counter abilities will mean a lot more this time around. SE has learned all jobs like to melee in some capacity. It took SE 2 attempts to figure out how a hybrid job works, but BLU was a success and DNC followed that trend. I can easily see more BLU and DNC style jobs at launch. Like the dedicated melee jobs, I believe RDM or other hybrid classes will have unique traits that fill niche roles beyond mere support.
I think the hate system will still exist, albeit a few changes. For starters, more strategy seems to be what SE is hinting at in their interviews.
Players looking for action can start sharpening their blades in anticipation for a battle system that takes a marked departure from Final Fantasy XI. In order to make the battles interesting and have lasting appeal, there will be a number of strategical elements added to encounters. They imply there will be a learning curve of sorts - beginners can expect simpler fights as they get the hang of things, while hardcore players looking to test their mettle can find serious battles that require much more cunning. It will not be realtime, action style encounters, but rather a number of more cerebral aspects.
The last sentence leads me to believe the enemy AI will get a huge boost. It's not going to much of a fight if the mob is stupid. You know like in FFXI a mob casts Sleepga followed by Diaga or Poisonga. I also believe the interface will get a huge facelift in order to adapt to these tougher foes.
So what do you guys think?