I have played the most recent version just last night and I must say, its looking very good. There are a few things I would love to see fixed/cleaned up. That being...
Spelling, Grammar, Suffixes!
Some of the items tool tip, and basic tool tips are worded very badly, personally I would advise going over every item and cleaning it up a bit.
Grammar, quite a lot of the items have bad grammar. I know this is not a current #1 issue, however with a map coming along like this I would love to see it put together in as much a professional and neat manner as possible.
Suffixes!!! I can only assume Diablo 3 will keep with the past, and more likely general suffixes used on many randomly generated items in not only the Diablo universe, but in any MMO or RPG. IE. Armor of Agility, should more than likely use Armor of the Monkey. (Preferably one of the Diablo suffixes, etc as seen here
Diablo II Item Suffixes) (I would be more than willing to offer a hand at doing a complete item, and item tool tip overhaul)
Also, with this more recent addition (1.11) there are a few spells that have incorrect, or to an extent broken tool tips. A few of the Barbarian abilities have messed up text causing lines to start next to a previous ability looking something like this...
JASS:
Level 1: X Damage
Level 2: X DamageLevel 3
X Damage
Gameplay in 1.11
The Siege Breaker Assault Beast uses his knock ability a hell of a lot, personally I feel the ability needs to be toned down, or at least put on a longer cool down.
Also! Allow Health Potions to stack like Mana Potions, its annoying that my fellow party members can carry 8 or more Mana Potions and I can only carry a max of 3 Health Potions!
Aside from that 1.11 and more importantly the BETA is shaping up quite nicely and I can't wait to see the new inventory system!