Just chiming in that i think you reworking of subtitles is a good idea, and matches what commercial disc’s seem to be doing. There needs to be a good reason not to have a subtitle at the bottom. covering up burned in text is one reason (credits, on screen dialog, etc), and direct continuation of a previous subtitle. but the normal place to look for subtitles is the bottom of the screen, and they are easier to read there, so that should be the default location, and you should have a good reason not to be down there.

😃