Easy to read? Your mileage may vary...
I have found that some decks which were amazingly easy to grasp right away and to read beautifully for me...do not do so for everyone else I meet!
This list includes, Morgan's Tarot, Celestial Wisdom, CLOW, Oracle of the Radiant Sun, Angelynx, Good/Bad Witch...and a host of others that I don't bother reading the instruction/booklet for, because they already sing to me.
Easy...um...easy is Crowstones (again, that might just be me.) Easy is Madame Endora and Psycards. The original Faeries Oracle is pretty sweet and easy...(though the Heart, is less so)
Answerdeck, Medicine Cards Just For Today, and Q-cards are all super easy to read and interpret.
And Doreen Virtue oracles are easy...but insipid, and way too one sided.