McFaire
Although there are only 3 suits in the minor arcana, I did not simply remove one of them. They are organized by element, each with a Patron figure in the Major arcana. Fire represents action and material. Wind represents thoughts and plans. Water represents emotion and relationships. As with the major arcana, I took stock of the function of all the cards in the 4 traditional suits and tried to make sure that each was somehow addressed (again, sometimes with a single card, sometimes spread across multiple cards). So while the suit of water in my deck is similar to the suit of cups in a traditional deck, you'll find things in it that are not in cups, and you'll find things in the suits of fire or wind that would typically be in the cups.
Most oracles are not that complex. They usually don't try to be as comprehensive as a Tarot. Why? Because there's a limited amount time that is reasonable for readers to invest in one unique system.
Readers put years into learning Tarot systems, and this allows them use and appreciate many decks. If you're asking readers to learn an entirely new system that is as complex as traditional Tarot, you'll probably be disappointed.
That's why, in general, popular oracle decks tend to be less complex and more intuitive, and popular Tarot decks tend to use more familiar/traditional Tarot structure.