One more thing I noticed - there’s a low rumble when Finn sees the Finalizer, but I don’t think it’s loud enough for Finn to notice, at least with the music. Perhaps it would help to mix in a more conventional ship sound, something like when the Falcon enters Yavin IV’s atmosphere.
I think he originally reacts to the crowd reaction. But you may be right. If you could link to the ship sound you’re referring to it would help.
Something like this: https://youtu.be/-3TGJu39b5s?t=37s
Really, anything engine-like with some treble, even if it doesn’t continue into the following shots.