Starcraft 2 Beta Patch 16 Release - Apparently there was some balance changes. The Ultralisk buff should definitely help. Oh yeah this patch also fix a major issue. The only thing i don't like is the rally change.
Get the latest SC2 patch download from here.
StarCraft II Beta – Patch 16 (version 0.19.0.15976)
General
Balance Changes
Get the latest SC2 patch download from here.
StarCraft II Beta – Patch 16 (version 0.19.0.15976)
General
- Rally points now behave as a move command, instead of an attack  move command. 
 
- Enabled the ability to manually add a StarCraft II  character friend using the player's character code. Character code is a  server-assigned numerical code that is displayed within the Add Friend  panel. 
 
- Battle.net Achievements & Rewards have been updated. 
 
- All Quick Match modes are now available: 1v1, 2v2, 3v3,  4v4, and Free For All. 
 
- All A.I. difficulties are now available for play. 
 
- Cooperative matchmaking versus A.I. players is now  available as a play mode. 
 
- Enabled cross-game social features between World of Warcraft and StarCraft II.
Balance Changes
- ZERG- Infestor- Frenzy spell removed.
- Infested Terran spell added.
 
- Overseer- Infested Terran spell removed.
 
- Ultralisk- Now immune to stuns and mind control.
 
 
- Infestor