Open Theism is a profound breath of doctrinal fresh air. Believers already live as though it is true. Let us hope it is a matter of time before the church's doctrinal foundation catches up to its practice.
It is unfortunate that those who uphold the personal, loving, responsive, perfect God of the Bible (in contrast to an abstract, philosophical static model) are considered heretics. The Open View is often misrepresented or misunderstood (e.g. confusing it with Process theology).
Calvinism is entrenched in some circles. Not enough critical thinking has been done on the problems that arise out of it (negation of genuine free will; predestination, etc.).