Dave, my friend, I think as things stand, you ought to be able to request that an Entry Clearance MANAGER look at your case ... with a view to having the ECO's decision overturned. Although I personally am not familiar with the "ins and outs" of situations where a divorce settlement has taken place [my second wife and myself having both been widowed] I believe your ex has proved, beyond all doubt, that she will not stand in the way of your future happiness.
And so, in the circumstances,
with the replies you've received from our other co-forumers, and wish you the very best of luck with whatever course of action you decide to take. But please don't hesitate to ask - should you need further support.