Liked all the suggestions. +1.
I know the Matinee, own several of these options natively, and I think the challenge now was to make them more user friendly and easy to configure the user.
This mockup that Epic did Sequencer is great, this new interface is very nice, with the main functions within easy reach, perfect.
One suggestion would be greater control to use subtitles, as well as allowing insert an easier way subtitles in multi-languages.