Most complaints about the score sounding off are sort of bs. The fact the the LSO didn’t do it and JW didn’t conduct everything has nothing to do with the fact that it sounds different (both, I believe, were done for health reasons).
The mix is a bit different than the other SW scores and the sound is different as well, but this is a different movie and a different trilogy. Each Star Wars film had a distinct main title performance before the PT where TPM’s was used for all three. Personally, I like the subtle differences between them. TFA’s first note doesn’t seem to have any percussion (or at least very little) going along with it which I assume is the reason people are complaining (ady’s version seems to add elements from the original). But I don’t have a problem with it as I don’t see it as any big of a difference than say ROTJ having the percussion come in early.