It has been awhile since I’ve watched the original film, but is the mention of their planet destroying abilities tied into the kijimi destruction? Wasn’t it mentioned before that happened? If that line is NOT tied to that sequence, we don’t need to see it happen. It is strange in itself that ONE destroyer is let out no problem but a whole fleet can’t? That part in itself was odd.
If the LINE about their planet destroying ability is kept in since it is separate from the planet destruction scene, we don’t need that scene at all and it keeps the “stakes high” as well as not needing to wonder “How did they survive the planet’s destruction” thought with Babu and crew.