And? If you had that many variations on themes, would that really be so bad? Nobody says you have to play all of them, and if there were only minor differences between them it would only speed up learning to fight against them. And personality comes across in a moveset; just taking your example of the S&S characters, that would give you styles that move like a confident veteran fighter (Sophitia), scared amateur (Pyrrha), angry and violent (O-P), confident and playful (Cassandra), Arrogant and unique, compared to the others (Pat) and wild psycho (Lizardman S&S). You might only see six styles with swords and shields but I see six distinct personalities that come through in everything from their stances to win poses and thats a boon for character creation.