I can understand why people complained about the idea of the Excelsior replacing the old Connie design. For one thing fans ALWAYS complain about change. Always. Without fail. Even if the thing being changed is something they complained about when it turned up in the first place. Secondly, it's just not a very consistent or carefully thought out design and like the Oberth, the details are somewhat wanting.
I mean Probert spent WAY more time and thought into designing the refit (and later, the E-D) than whomever it was at ILM responsible for the Excelsior & the Grissom. Not that I'm criticizing the quality mind. They're all quality builds and the sleek, low detail aesthetic was most likely mandated, but they just felt like a little too much of a departure from the look of the Enterprise & the Reliant IMO.