[mikeb8591]

omxplayer is deprecated. It is limited in features compared to mmal (the video player runs on gpu so doesn't benefit from new kodi features).
It has missing features including dvds with menus, alsa audio, software decode, drm/widevine.
It's mainly intended for use on Pi0/Pi1 which have much slower arm cores.

Bummer. I've been running (on a PI 3 B) with mmal disabled because it performs so poorly for me.

I get a lot of pauses, and horrible lipflap issues on live tv. sometimes the a/v is several seconds out of sync.

Thanks,
Mike