I fly a Galaxy-X, and honestly it's better than the R, although there is little difference between the two. Really the only difference is the consoles, and the Ens Boff slot. (On the Gal-R its an ENG, on the Gal-X its a Tac)
One thing I have found really interesting after looking at the Ambassador, is the Ambassador and Excelsior are RA level ships. The Galaxy-X and Galaxy-R are both VA level ships, but aside from the Galaxy's having 1000 crew compared to 700 and 750, they are virtually the same. The Galaxy X/R, and the Assault Cruiser Refit need a boost to put them more in line with the Oddy Command Cruiser, and less closely related to the RA level ships.
What they should do is give the ship it's flagship status back by changing it's stats to being as versatile as the Odyssey without eclipsing it.
The Galaxy isn't the flagship anymore, the Odyssey is. I mean according to Lore, the Odyssey is what they used for the Enterprise F. So they won't do anything that gives the Galaxy back that status. Buffing it for the sake of how it plays in game is fine. But it will never be considered the flagship again.