A couple of things on The Line™:
It’s not really a matter of cramming more words into the same tight space - if you line them up, the new line does last longer, but we can fudge that since Kylo’s lips don’t move - the problem is just that we’re taking voice clips from like 3 or 4 different sources. Cutoffs between syllables don’t line up, inflections are different, timing is off…getting it to flow perfectly is next to impossible.
It will, however, sound better in the context of the film than as an isolated audio clip, for a number of reasons. First, the clip is only center channel audio; the full thing will have louder music and sound effects, which will help to mask the seams. The image will also help to distract viewers. (Which is why I shared it originally as a video clip.) Also, people aren’t going to be listening to the one line 30+ times on repeat, trying to pick out the holes. Quick half second, and it’s gone.
I think, conceptually, it’s worth keeping it in even if it’s not quite 100% perfect. What it adds to the continuity and the nuance of the film is worth a slight blip, in my opinion. I can definitely twiddle with it more though, and see if I can make it any tighter.