For Minh, this card seems like an auto include.
Think about it this way, were you playing Guts!, Perception or Manual Dexterity?
Well, if you drop two copies of ANY of those cards you are trading a +1 and a card draw for the ability to perform a small, filtered draw.
Outside of Minh, I think this card struggles a bit in Seeker. Norman Withers may also like it for those turns where he sees a top card he doesn't particularly care for (the shuffle will give you another opportunity for a card, for better or worse). I don't think I would bother with this card in either Rex (outside of a weird build) or Daisy (she has Book of Lore).