I suspect it will happen eventually, but with TCJA looming, it's probably a low priority.
Also the administration of the PTIN was subcontracted out to a third party, so the refunds will be dependent on how long the subcontracting and funding of the refund process takes ?
Case in point: My largest client is an ALE under ACA definitions so they are subject to the penalties for not providing health insurance.
They did not receive their proposed penalties for 2015 until June 2018. They have yet to receive any correspondence regarding 2016 penalties.