After a *lot* of challenges I'd given up on playing straight DVDs on the Mele Android media player. Great news: Wondershare Player will play DVDs, including menus!
Wondershare Player: The Best Android Video Player
It also has very good direct "play from server hard drive" feature, which is quite nice. You don't need to mess with CifsMounter and other things.
Alas the configuration isn't that hot. During playback you can scan back and forth, turn subtitles on, and change the aspect ratio, and that's about it. For some reason it'll play a DVD structure via a network share, but not from the same share mounted locally.