No. The reason being that the scripts required modifications to work in RMVX (and I still have no idea if that's sufficient), so what makes you think that Essentials will magically not require any changes to work in the next iteration of the RPG Maker software?
As for what changes might be required, no one knows. RMMV isn't out yet, you may have noticed, and without knowing what the scripting will be like in it, or what changes it will make to, well, everything, you'd have to be some kind of wizard to know what alterations will be needed.