You only get that cavalier when you have already won. You can be hopeful but come on it's the Empire.

They would only get that cocky if the Empire had pretended to lose loads of battles and killing the Emperor on the Death Star was their final move.

Which might be interesting.

You could have a scene of Rebel ships leaving drifting Imperial craft after a battle to join the growing Armada (only to have the not so damaged craft 'wake up' again when they have gone).

That could lead to false confidence.

Fishy you would be top of my Christmas card list if I gave Christmas cards out to people based on utterly brilliant achievements in pedantry.

The scene would still be shorter without the bits I referred to.