If I had envisioned an Enterprise-E, I think it would've been like the Excalibur class which I don't have a link to.
It has a number of similarities to the Sovereign but is about twice the length and looks alot sturdier.
That said, my dream ship would incorporate elements of Vektors Grandeur class, Galen's Legacy class...........and of similiar size to the Excalibur.
I truly believe for dramatic purposes, the E should've been at least notably larger in overall size than the D rather than just being 63% of the Galaxy class.