The first of the changes from the latest version features several hero adjustments. Most of the heroes feature either increases or decreases in their damage and range values. Others, such as Lord Avernus, have their cast ranges inverted so certain effects have different play styles altogether. On a further note, King Leoric, who is generally the most unchanged hero in the game, has had his Vampiric Aura increased in effect.

Every item change in the latest version has added extra value to the items in question. These include damage increases, cooldown decreses, ect. Also, the phase boots and power treads dillema has successfully been resolved by changing the items required and the effects of the items.

The greatest changes, however, lie with the gameplay, cosmetics and the scoreboard. The buyback system has been reworked to show as "100+Level*Level*1.5+Time*15". Excess and unneeded information on the scoreboard has been refined, such as the time information that is already displayed in the user interface. Also, the allied gold, along with ultimate cooldowns, hero levels and player respawn times have been added to display as much information as possible in as little space.

Several other features, such as player teleportation coloring and game commands have been added to better organize and inform the players with necessary information.

Source: DotA Changelogs, Official DotA Allstars: Downloads