I'm hoping for FCP X 10.5 they include built-in motion tracking (without need for a third-party plug-in), especially since other professional and consumer/prosumer video editors now have it, like Adobe Premiere Pro, Magix Vegas, Cyberlink PoweDirector and Corel VideoStudio. I'd also like to see some more of the old iMovie video effects added to FCP X, ever since they added some old favorites like Earthquake and Rain and Soft Focus (which was renamed to something else). Maybe they could bring back Electricity, Fairy Dust, Fog, and a built-in Lens Flare generator. After all, it seems several of those iMovie HD features that got dropped when iMovie was redone in 2007 found their way to FCP X.
I also want to see them fix up their DV import feature, since when it captures from my Canon Optura 60 MiniDV camcorder (like when I am archiving old footage) it comes out silent. Premiere Pro CC 2020 only gives me the option to capture in "HDV," not standard-def "DV", so I think either they or FCP X should address that issue (as I may want to also transfer some family and friends' MiniDV tapes to DVD or something for them as a side business, along with analog videotape formats.)