We would lose quite a few features and would no longer be relying on Google for MediaCodec (hardware decoders) support, as such it’s unlikely MPV will ever be on the table for Android as it wouldn’t make things better, but worse.
We are looking into improving our subtitle support though so that we can transcode audio and direct play the subtitles without having to transcode the video (the OP’s original annoyance). MPV however wouldn’t solve that.
