The crackly blue saber fits nicely into Rey’s inner conflict, fearing that she may go dark. The saber was split in half the last time we saw it and making it crackle lets that event have some sort of meaningful (or any) effect on the story following. Rey needs guidance, needs discipline, and needs to cohere. It also makes some more sense of the line about earning the saber.
It just fits like a glove, so it’ll be great to see completed. But, if you prefer it to be absent, I’d suggest keeping your copy of V1 and editing in any other potential V2 alterations you like.