I certainly don't agree. Just being on a 64bit engine is worth the upgrade. Visually it's admittedly a small step but for modding it's entered a brand new era and that is very, very exciting.
There is a noticeable difference in the lighting and slight subtle changes in some textures but that is it.
As for the save games, I had issue transfering mine over due to the shear number of mods I was using with the original. Best thing to do is remove all mods except the official DLC and Official HD texture pack and do a quick save then copy the file over.