@belqarionriva the number stands for the time needed to perform a single attack. For example att speed of 2,5 means you will perform a single hit in 2,5 seconds. So the lower the number, the faster you attack, meaning you have higher DPS.
There should be a way to select multiple items when refining (say, by holding down ctrl). As things stand, we can either refine them one by one, or refine all of the items of the same rarity. This becomes a problem, when I want to keep several epic items, but refine all of the other epic items, 'cause I have to do it one by one...
The arena is unfair. There should be something like separate arenas for different levels, for example arena for lvls 20-29,30-39,40-49 etc.
It's sometimes impossible to finish quests cause you end up fighting people that are a lot higher level than you. Please take that into consideration.