I'm just nit picking a bit here, but...
Obviously it's not exhaustive (you can't dodge spells, and it doesn't spell that out for you), but it's got practically everything you could possibly need if you're not that concerned about high-end raiding. Especially helpful are the to-hit percentages for each level of enemy you could be facing, which has all but eliminated the droves of people asking "how much hit I need" in trade chat.
For leveling, yes, much choice in equipment is pointless. But then, you get a lot more choice out of your talent tree while leveling than you do at cap because the order in which you take them can differ... and you can respec to something more cookie-cutter once you hit 85. Do you want the survival traits now because you like soloing, or the max DPS talents first because you like to do dungeons, or the mobility talents because you run around exploring or crafting more than grinding, etc etc.
There are actually tooltips in the character info panel that tell you the majority of this. I'm a protection paladin, so knowing how much incoming damage I'm avoiding is important. If you have Character Information panel open, you can scroll through your various stats and mouse over the ones you're concerned about. For example, I can scroll down to Defenses and hover over Armor, which will tell me how much I have, how much extra is there through spells and enchantments, and that it blocks a certain percentage of incoming physical damage. Going down to block, it tells me how much of a percentage change I have to make one of those, and that it stops a straight 30% of incoming damage.This is even before you have to account for mysterious variables like diminishing returns, hard numeric caps, soft numeric caps, and how your stats interact with those of the monsters you're fighting. Does dodge rating apply to incoming spells? Does Parry interact with ranged attacks? What's the difference between block and armor, since both seem to reduce incoming damage? There's nothing in game to answer any of these questions, and so a majority of the players fumble around in the dark.
Obviously it's not exhaustive (you can't dodge spells, and it doesn't spell that out for you), but it's got practically everything you could possibly need if you're not that concerned about high-end raiding. Especially helpful are the to-hit percentages for each level of enemy you could be facing, which has all but eliminated the droves of people asking "how much hit I need" in trade chat.
For leveling, yes, much choice in equipment is pointless. But then, you get a lot more choice out of your talent tree while leveling than you do at cap because the order in which you take them can differ... and you can respec to something more cookie-cutter once you hit 85. Do you want the survival traits now because you like soloing, or the max DPS talents first because you like to do dungeons, or the mobility talents because you run around exploring or crafting more than grinding, etc etc.