Normally in Gen 3 this is how Compound Eyes worked outside of battle:
Of course this is OP in PokeMMO, this would affect a lot of items specially the Lucky Egg, but let's see how this was changed in Gen 5:
You know if they reduce the chance from 20% to 10% this would be less exploitable, and if you think is still too much, just make it useless in the safari or something.
Anyway.