I understand where you are coming from but I feel the unwieldy amount of spells actively prevents good choices. think about this. picking the best fire spell is easy, but there are so many fire spells that are not only bad but horrible. now look at acid. there are some clear choices for good spells but there are so few you predy much have to take all of them if you are an acid focused character. this is what I think many people mean by unwieldy. there are some spell types so over-represented they actively remove choice. then there are spells groups that lack any support.