Re: BW having no balance patches. Maps balanced the matchups in BW for years. There were only four maps in a pool with more extreme differences between them. The SC2 map system doesn't serve the same purpose so seasonal balance tweaks are more important.
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As long as a map didn't heavily favor the same race in both its matchups, like T>P AND T>Z, then it could stay a while. That can be worked with.
As bad as PvZ was for years in BW, if Protoss got to pick all 4 maps for a bo5 (one map played both first and last), it'd be a fair fight or Protoss favored. Despite how many SC2 maps there are, I don't think protoss players can pick 7 maps to beat top zergs in SC2 in a bo7.
