Sorry to hear about your frustrations with Studio-1, as there are other fish in the sea.
From my view, the world of audio production is too expansive to offer a narrow path and expect a DAW to be a leader in the field. I agree with you that Studio-1 should not venture into video compositing and production. Most major movie studios will produce the audio for film production on respected audio software, which requires a complete video frame playback device, and then they transfer the post production audio into the video software for minor audio tweaks. As an audio composer, I don’t want to limit my potential clients to only those doing silent movies!