Your right, it would change the image of the Club.
Instead of being viewed as "plucky Everton", we would become "dat Everton that sold all its best players and ended up The Championship, with a shiny new Stand on 1 side of the pitch".
Clearly you have thought about this a lot and im not gonna knock the fact your coming up with things, but I personally think its a terrible idea.
Plus you expect to attract fans back, AFTER selling all the best players?
The majority of fans would rather see progress being made on the pitch, rather than in the stands.
But your right in 1 thing, they only way we can go forward is to improve Goodison, I just dont feel selling Star players is the way to go.