You can't keep on polishing the turd, the trad chassis is not and will never be an Elise. Just giving it more power won't make it a Porsche.
Morgan is trying to make a more focussed, more powerful and better handling Plus 4 with a well regarded engine; it was never trying to make a Lotus or a Porsche.
I like the concept of an old tech chassis improved to make it more usable and exciting, but not to change its underlying character.