Sabine's Weapon & Power Core

I find it ridiculous that Sabine Wren's little invention was able to take down an Imperial-class Star Destroyer that easily. Absolutely ridiculous. The scaling of the ship while the Mandalorians are flying by on their jetpacks was completely off as well. These starships are massive, they are not small.

The overloading issue with the power core would have been restricted to the flight deck, and that's it. It would not have penetrated every single system in the Star Destroyer. If that was the case, Sabine would have developed these weapons for use against the Empire throughout the Galactic Civil war, and their tens of thousands of Star Destroyers in use during that time.