[jahewson]

That character is from the phonetic alphabet so it's not the "concept of G", it's the concept of a "voiced uvular stop", which happens to looks visually like G. So what Unicode is doing is separating two conceptually different ideas, exactly as intended.

The cases where Unicode has taken similar looking characters and combined them into one have not been successful, Han Unification for example was widely viewed as a misstep and has caused many problems, such as making it impossible to embed certain Japanese characters in Chinese text without higher-level markup.