What you've got to remember is that The Imperiums Hyperdrive technology is extremely powerful, yet also extremely limited.
For example, they clearly fitted out the Death Star with a hyperdrive, that's how it managed to get from the Alderaan system to the Yavin system in double-quick time; However they could only navigate to reappear from hyperspace on the wrong side of the planet, and had to resort to orbiting the planet at a snails-pace, giving the Rebels a chance to destroy it.
Clearly, if they had had the capability of a hyperdrive "hop" to the other side of the planet, they would have used it.
Also, the fearsome weapon that can destroy terrestrial-type planets, is clearly ineffective against gas giants, as otherwise they would have blasted it straight into the middle of Yavin, probably taking out the moon in the process, destroying the rebels without even having to get their hands dirty.
Again, this did not happen, so presumably, the big gun isn't that good either.
If the Death Star's weaponry is that limited, then I doubt a Star Destroyer could take on any of the Federation's ships and come out in one piece. Also, they have a habit of crashing into each other, which doesn't help durting tight formation flying manouevres.
Anyway, this is all pretty academic. The Andromeda Ascendent would kick all of their arses...
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