Well I ended up going back to Yosemite and it still moves pretty slow but it doesn’t completely crash on me anymore which is a plus I guess. I cut down from importing 10,000 images at once to 1,000 and it takes about 10-15 minutes each time to import. Sometimes when Final Cut comes back to life it’ll show that none of the images imported which is annoying and then I’ll have to reimport, maybe it’s just something I have to learn to be patient with?