A new, dedicated balance patch was shipped yesterday. It's one of the biggest balance changes so far since release. Here are some highlights:

• Various Tank nerfs, adressing the 3 Factory / Tank opening meta
  
• Much greater range bonus for entrenched units, which increases the game's space control element
  
• Commandos always spotted by non-Tank land entities at point-blank range
  

See Release Notes for more info and watch this replay between SomeoneSaidMyNicknameSucks and Plantblock (both of whom are pros) for an example of the new, great gameplay.