The only saber ignition sound that I noticed was Luke’s on Crait and I was okay with it because it wasn’t even real.
For TFA, the sound was usually different from the other films, though consistent with itself. Odd. I just saw TLJ a third time and I just don’t remember the saber stuff well enough. I would recommend editing out ignition sounds that are distinct from how that saber sounded in. ROTS, ANH, ESB, or TFA. Especially sounds that are closely associated with other sabers. Exception being Crait, since if all other cases are correct, it’d just be another clue about what’s is going on.
From what I remember, I think the saber ignition sound in TFA is incorrect, at least when Finn first lights it up. The same sound is made in TLJ I believe.
On a side note, I think I might try and do a 3D replacement for Luke’s lightsaber at the end. To me it just doesn’t make any sense that his blue one would be the one he would project. I mean he hand built the green one and had it a lot longer than he had the blue. I may do some mock ups just to see if I can pull it off.