I hadn’t considered it like that but you’re right: the rush is the logistics of the fleet taking off. My only concern is that this may not be clear until late in the film. There are a few times during the adventure when characters say “We don’t have time to X.”
And that’s an interesting read on the Leia death, with Rey feeling responsible for it. That makes sense! I’ll have to play with the scene, though, unless there’s a mock-up out there I may just not be remembering right now. If Rey stabbing Kylo is followed by Rey dropping headphones, there’d be a lot to cram in from Leia before seeing her give out altogether.
For the first part, yes, they don’t have time for “x” because they need to hurry up and stop the fleet. Why the rush? It is explained at the briefing. We can stop them in their tracks if we destroy their beacon. Once they are out, it’s game over. That’s how they even HAD A CHANCE to win with a small fleet. Destroy the beacon, they are trapped. Game over for the baddies.
I really think this is simple, no other work needs to be done, just remove the timer, which makes no sense. What’s 16 hours in a galaxy? How do you do it if we are talking about different planets, different solar rotations, planet spinning, etc. Just removing that stupid timer is such a breath of fresh air. We get an explanation on the rush. Think about this all, the movie itself doesn’t explain things. How did Palps live? (Disney still hasn’t given a clear answer, they go back and forth.) What did Finn want to say to Rey (RJ Tweeted it since it was explained or talked about in the movie) How did the Wayfinder survive in Kylo’s TIE when it EXPLODED? (Oh yeah, plot armor) How did Ben reach Exegol in a standard TIE Fighter? (Oh yeah, RJ tweeted it was a special TIE with hyperdrive even though its been established those TIES do not.)
Let’s not get too caught up on full on explanations.