So that's the cursor Jeff was talking about. Maybe it's a a carry over from the Vita version that gives you an onscreen guide for what you're pressing....until the cursor appeared during gameplay and I have no reason why it exists.
The cursor (controlled with the right analog) is part of the looting system. You use it to point areas for the thief NPC to explore or loot; it's also how you open secret passages. Indeed, on the Vita you can just touch the screen (although perhaps you can use the right analog as well?).
By the way, that bit about the thief is a LIFESAVER. Anyone who's played DDTOD/DDSOM knows what I mean; behold the deadliest enemy in Mystara, the silver coin.
I love that the Archer picks up and reuses arrows straight away just by walking over them, though. EDIT: After seeign the gameplay videos, it seems that the thief doesn't loot stuff on the ground; you do pick money yourself, but just by walking over it. As long as my character doesn't derp and go "ooohh, shiny" in the middle of a fight, I'm good. It also seems like handheld items like bombs are picked up using the Triangle button, which I assume is not otherwise used for attacking. In any case, you can see footage of the thief unlocking a chest as directed by the cursor in one of the videos.
Other stuff that's kind of new for me from the trailers:
1) I didn't know the spellcasters could recharge Magic Points; that's pretty cool to keep them in the action, although it kind of diminishes the resource managements aspect of the D&D arcades. EDIT: After seeing the gameplay videos, it seems that "big", equippable spells are still limited by number, and this energy is used for lesser spells like the air fireball. All is good!
2) We've only seen the sabertooth mount yet, right? Regardless, it's freaking awesome.
3) I LOVE the Amazon's dive kick, it's so TMNT arcade-like.
4) Also love how she can plant her axe and bring the pain bare-fisted, and how all characters can also lose their weapons. For some reason it's something I love, and it reminds me a lot of Aliens vs Predator arcade. This game seems to be channeling the best aspects of the entire history of sidescrolling beat'em ups!