Filesize-wise I didn’t change anything, it was more to have more control over versions and debug (had some small issues).
Again, just take a look inside the folders to see what is taking up that much space. Something I’ve seen happen in the past is when you run electrify package while there’s already a folder with a build in it, it might nest apps, so there’s unnecessary files inside. I always remove the build folder before packaging as a rule.