I might be wrong, as I don't know if we'll see those Academy displays again anytime soon, but I'm not convinced that the
Excelsior Raffi and Elnor are serving on is intended to be the original USS Excelsior, virtually unchanged (apparently) in its appearance. There's a
plaque underneath the display with Sulu's name on it, and the next display shows the original Constellation class
Stargazer (which Picard commanded, including the
TNG era dates) followed by one showing the Galaxy class E-D (visible
here, rather blurrily, over Elnor's shoulder). The visible text on the
Stargazer's plaque even hints it's now a museum piece on fleet display.
I might have to rewatch the episode or look at better screencaps when they become available, but to me this suggests Elnor is just looking at the
Excelsior's history and not at any sort of assignment screen. The
Excelsior might wind up looking different, even it's clearly based on the original design. But I'm inclined to think these are just historical displays and nothing more.