>>37820472OW encounters but not like your pic.
In a good game with OW encounters (aka not LGPE), areas would be large enough that you'd have to actually search for the Pokemon you want in order to find it (unless you'd luckly stumble upon it directly by chance, but well...).
This way it wouldn't be "handed" to you, but the gameplay to find it would be more interesting than running in circle in a tiny grass patch.