My Diablo 3 Gripes and Wants Wishlist:
-Strafing/Directional Movement-I want to be able to run and electrocute at the same time, preferably in the backward direction.
-Better textures - the textures are just plain bad. This game looks like it is from 2000.
-Character customization - maybe I want my wizard to have yellow hair or not like a kdrama star?
-Better Auction House Filters - where is the +DMG?
-Skill Activation - I want to be able to trip a skill while I'm channeling a primary. I shouldn't need to unclick my mouse button to press 1 or 2.
-More Skill slots, I'm fine with having 6 active at a time, but you might run into a fight where you need to swap out skills. Have a cool down that's fine, but make the swapping less cumbersome, so I can do it while mobs are swarming me without bringing up a menu that takes up half the screen.
-Make legendary weapons...legendary. I've had a few drops so far, but they have gone for cheaper than most blues I get.
-Fix the lag - it's a single player game, good lord why is there lag? I thought you just needed to auth to the server and then everything was local. Why do I lag for 5-10 seconds and why does it happen when there are 10 elite mobs surrounding me.
-I shouldn't need to leave the game to access the auction house.
Considering this is a reskinning of WoW. I'm surprised they are having so many issues. Servers should be rock solid, auction house should work just like it did there or better. WoW even had better graphics. I would have preferred they wait another month or two and release a polished game, because this in my opinion is beta quality. I'm concerned with the replay, since it is essentially just a gear grind after you beat it once. Which isn't the most appealing thing to be honest.
For me, I don't think the graphics are half bad. In fact, I think they are quite solid for today's games. maybe not revolutionary, but certainly better than 2000. I would suggest that you fire up D2 and compare. Considering it came out ~2000, you will ABSOLUTELY see much improvement.
About character customization, "For me" this was never the intent of this type of game. I don't fault them at all for not having sixteen ZILLION face/hair/body models for characters. I would much rather them have spent their time as they did, on game play.
I haven't gotten to legendary weapons yet, so I know only what I have read. And I would 'hope' that they were sets like in the previous games.
I haven't used the auction house yet either, so no comment there.
As for LAG, I am sure that Blizzard would say it isn't intended to be a single player game. And it was a well known fact that it was Always online, even the single player game. More's the pity. While I agree that there shouldn't be LAG in single player, that isn't the game we got. And isn't going to change.