This week’s update gives us no new heroes and since The International 2013 Qualifiers is drawing closer and closer, there are no major changes, too. This patch, however, is mostly for people who enjoy playing 1-v-1 matches as well as for those who think that the weekly reports should be reduced.  Also, a performance update brings some good news for people running DOTA 2 on systems with 2GB RAM or lower.
UPDATE NOTES
May 8, 2013
Source: DOTA 2 Dev Forums
– Added Solo Matchmaking option. This is an experimental feature that will match you with players who also queued without being in a party. This is the first step in a series aimed at improving the matchmaking system.
COMMUNITY
– Reduced the number of negative reports per week to 2 as part of our ongoing efforts to improve and tune the reporting and ban systems.
GAMEPLAY
– Elder Titan: Fixed Legacy Keys
– Drow Ranger: Fixed Frost Arrows slowing Spirit Bear for the full creep duration
– Tusk: Fixed Walrus Punch having 1 less second of slow than intended.
– Tusk: Fixed Armlet sometimes causing Walrus Punch to disappear after using Snowball.
PERFORMANCE
– Reduced memory usage on systems with 2GB of RAM or less