That exhaust nozzle comes close to a LOAN (Low Observables Axisymmetric Nozzle) one as was tested on a F-16, It wouldn't take much to combine it with an AVEN (Axisymmetric Vectoring Exhaust Nozzle) one as well. Go to F-16.net and search for NF-16D and you'll find good references for both GE and P&W vectoring nozzles and the comparatively minor external appearance changes these caused. 'Twould be a nice touch to add that cpability here.