EFPSE is certainly the easiest tool to use to make retro fps games. and i agree with the desire to expand on the possibilities of the engine. but it's a one-person operation, and JessicoChan has their own view on what to include and not to include. we will just see how it develops, and work with whatever features are made available. as of now it is about halfway between wolfenstein3d and doom.
i agree that i am a fan of EFPSE, and will continue to use it. i just will also continue to dabble in other engines as well.