I thought the score for the fleet’s arrival was a little too triumphant, as if they already won before the battle had even started, I think something like this would have worked better.
https://youtu.be/KYDeNziSwFc
I don’t have a problem with the music choice as is, but even considering your point, I think you took it too far. Not that what you picked doesn’t fit the scene, I just don’t think it’d fit the context of what’s going on. First of all, the battle has already started, but this track feels very much like “alright guys this is gonna be tough let’s get to work,” but we’ve already seen that portion of the battle. Second, it should be at least a little triumphant, Poe and the rest think they’ve just lost it all right before the fleet arrives - and it’s a surprisingly massive fleet that arrives - so it should be a bit of a victorious cheer moment.
That said…
I think it should be a mix of both, with the original track starting when the battle shifts to the Resistances favour.
If anything I’d argue for the opposite. A taste of victory when they arrive, then shift to a bit less chipper a mood because the battle’s not over yet.