Good is always available and it is only defined when it has a specific meaning that is different from the generic one listed in part 4 "The operation was successful." - also it is listed in table where good is not an expected result - some results codes are expected to be empty or Null and would never be set to good.

In general we can review all table that do not have good, but we should not just add it if it is missing - also if the definition for it is the standard definition then we should question if it really needs to be in the table.
[generally client should expect that code other then what are listed are also possible - ones are listed for specific issues, so that a consistent code would always be received for that issue. Not all possible issues are enumerated, just common ones]

Method Result Code definitions without a Good definition are normal. OPC specifications other than Part 81, e.g. Part 14, also omit a definition for a Good Method Result Code.

The Method Result Code Good is implied, i.e. expected if the operation succeded, and not explicitly defined in the Method's results code definition table. If the statusCode Good is returned to indicate the successful operation of something other than the execution of a Method, e.g. VerificationVariablesErrors for Variable verified without errors, the specific meaning is defined in a status code table, e.g. Table 32.

agree with no change required