I wonder what her specs would really be, though? She took on two klingon ships and being of a later century... I wonder if she'd have ablative armor, shields stronger than Voyager's? I know she's pretty darn fast and maneuverable... but weapons, too? What kind of torpedos and phasers would she have? Previous Rhode Islands we've seen have all been closely balanced to the Nova, but being of Admiral Janeway's timeline, I somehow doubt that the Rhode Island would share its' older counterparts'... weak... nature. Also, Captain Kim had his ship out on a deep space assignment for FOUR years, and as such... she's got to have some impressive systems to handle that for such a small ship...
I'm just thinkin' aloud.