Re: Mana/Life Stealing = Mana/Life Globes?
@Zek, Globes are the replacement of both potions and leeching. Because those two were the only ways to get healed in Diablo 2, and now they're both gone. Get it? Leeching was a source for mana and life just as much as potions were, for physical characters that is. A barbarian in Diablo 2 can have a swing over a mob of creatures and get completely healed.
Actually he is right. Potions ARE still in the game, but at a reduced capacity, most likely much more rare, and it has been speculated that they will have a timer. Leach has not been mentioned to be in or out of the game, so it is really speculation at this point as to whether it will be present in simply a more rare capacity, or not at all.
Leeching is gone though, and the reason for that is the globes which prove to be more "tactical". Though I still can't see what's so tactical about them. They drag too much attention and for no reason. They're big, glowing, and make a *blurp* noise when you touch them, they are more easy to spot than any monster on the map. Even the potions didn't pull as much attention as those things... so they could at least make them less intense.
From the game play videos it looks like the skills are both more varied and mobile. Instead of a barbarian standing in place and swinging (yes I know D2 barb's could WW), he will be charging through, stomping, etc. more, and the idea is to have less "only 1 powerful skill is necessary" gameplay. To me, this makes it much more likely that where globes fall, and where you currently are, could be two different places. This means actually getting to the globes could present a challenge, depending on where the rest of the live monsters are. With leach, you really could just stand in place and zeal/frenzy/concentrate/fury/ect a group of monsters, and not have to worry over much about healing. The globe system is more tactical in that you actually have to go retrieve globes, probably while under monster fire, etc., as opposed to just standing still and having it happen.
Plus as was mentioned, globes aren't guaranteed from monsters the way leach is (any leach-able monster will give you health back), so you do have to conserve them, and plan tactically when you should use them.
Sorry for the huge block of text, but you still say you don't understand how it is more tactical. It is a more involved process to benefit from them, so you have to work into your battle plan, when to go after them, decide in your head if you can get to one before the monsters around it kill you, etc, where as leaching didn't require anything but holing the 1 skill down until everything was dead, which from basically everything we've seen about the game play in Diablo III, is something the Devs want to minimize, creating a game where each character class has 6-10 active skills useful in varying situations instead. Having to actively make a choice and react to how and when the globes drop requires more tactical thinking than standing in place and leeching from the monsters you are wailing on.
About ranged characters taking less damage than melee... or the opposite... I really didn't understand that, please explain yourself.
I think they mean that as a ranged character, they will be further from the action, mowing down enemies from afar. All characters play through the game by (ideally) dealing more damage to the monsters than the monsters deal back to them in return. A ranged character (physical or caster) minimizes the damage they take by being further back from the combat and avoiding the majority of the attacks (usually by having some sort of a tank, or by using kiting techniques), while a melee character would minimize the damage by having more defense/life etc, so that they can withstand more attacks.