I accidentally happened onto the fix for this problem yesterday! First, open a new project in iMovie, select the Far, Far Away title, and drag it onto the iMovie workspace. Now you can adjust its speed the same way we used to in previous versions of iMovie, but you need to hold down the "Command" key while you do it! So hold down the "Command" key, place your mouse cursor at the end of the title clip and drag it...now, just like earlier versions of iMovie, the farther you drag it, the slower it will run. Build your title as its own project, making it the length you need in your movie, adding background, checking spelling, etc. Once its in your movie, you will not be able to alter it like you can a normal title. Once you're satisfied with your title, export the title as its own short movie onto your computer desktop. Open your movie project in iMovie, then import your finished title back into your original movie. Obviously, compared to making a normal title, this is a tedious process (if your title is a little too long, or too short, or something's misspelled, you can't fix it in your movie as you can a normal title...you have to go back to your "title project", fix it there, then re-export/import), but it works...the Far, Far Away title will run as slowly as you want, and it will run smoothly!