To be honest I already was completely fine with old 1.5 version. Outside of few bugs and oversights - it had everything I needed - script system, automates, detailed manual. You better to bring this version of EFPSE to some sort of being complete, and only then switch it's graphics libraries, because it could take much more time that you anticipate. This way we at least will not hang with unfinished product and distant promises of updates, but have a proper, finalized version, and would be able to keep working and publishing games even without new updates arriving. Its also will be better for you - cause if we will have a working editor, you could make any changes to it without haste.