Surely there is no point in leaving the IPF standing, as with that still there the Airport has to still adhere to the Section 106 Agreement. Remove that and you remove the Section 106 and all the financial pay outs that the airport has to currently make to residents.
Interesting that they are redeveloping Rapide house, and not building something new. IIRC this means that when the IPF does hopefully go, they will still have PDR