contrascarpe,
oracles basically help us see that which we otherwise may not have, or be able to see.
there are many oracles that were basically designed for fortune telling, such as the lenormand and sybilla decks. the contemporary decks do seem to have more of a focus on spiritual growth or personal transformation.
more often than not, i use divination with spiritual growth in mind anyway, and i've yet to meet the deck that couldn't be used for divination.
tarot spreads work wonderfully with any deck! but, because they are such an intuitive deck, i would recommend using very small spreads with your soul cards. i usually use only one to three soul cards, because i find they work better for me if take plenty of time on each card to really let my intuition speak.
your idea for another thread sounds like a good one,
hope to read it soon.