I will comment on some of his projects, which AMT were involved in. The F9F Cougars were at an advanced stage of completion and unless GJE52 responds to my PMs, I have recruited someone to finish off the last few bits of 3D work preventing their release.
For the Hunters, different story. The LOD0 model was basically done and a beta slots completed for the family (Models were Mk1, Mk4, Mk6 and FGA9). At this stage we (Aviator Mod Team) have no firm plans regarding working on these but we would have to reassess the 3D situation before continuing work. Unfortunately GJE52 never shared any later versions of the Hunter 3D or the sources with anyone, so it's likely this project might die if the existing imported 3D isn't viable.