The new combat system, with action commands look intruging. This definately supports my wish of having skillchains! I'm looking forward to discovering if skillchains will be present and with some time experimenting, finding out if magic burts will also make a return!
Another part of combat I found interesting was the fact the developers during an interview hinted at the fact that it'll effectively be a "circle". I'll look forward to seeing more combat demonstrations to see if damage is increased when attacked from behind, and how groups will need to be strategic when fighting more than one enemy! I would imagine the developers are looking at potentially having players strategically place their characters to protect each in when in combat. IF this is in fact in the game, playing a mage should be theoretically more challenging. The improved combat tactics might make this game much more enjoyable from just a standard taking turns combat system to something that requires a little more co-ordination than the previous game. I can't wait to find the first quests that'll require some recruiting in order to complete =)
Two other things that made me think after viewing the demo. Mobs link which I'm happy to see makes a return. I'm sure they'll implement some system where agrros disappears over time, but I feel this is a good feature and it seems realtively realistic. Finally, I like the option of no weapon changes during combat. Players will be able to carry and work with multiple weapons, but once attacked/attacking the game will not allow a switch. This should help to make even casual gamers remain relatively balanced with experienced ones.
Personally I'm looking forward to exploring combat and learning the new system with other players. I'm betting that the players that choose to test out new tactics and areas will be the ones that get the most out of the system. So while levelling skills will be important, the most enjoyment will come from creating alliances with others and experimenting! So far so good Square!