This thing directly competes with Astounding Revelation and +1's are easier to come by than chunky resource boosts and bonus secrets.
What Surprising Find does is thin your deck to a rather insane level, it's what you do to mitigate the decision to build a 50 card Mandy Thompson deck or if a lengthy campaign has stuffed your deck that was already using Astounding Revelation with half a dozen extra weaknesses and story cards.
The fact that you dont draw an extra card unless you hit it with a search effect is a real problem for this thing. It'd actually be somewhat playable if the Draw were'nt locked into the search.
So, outside of 50-card Mandy, stay away.