When it comes to these DVD authoring programs. I think there should be two different kinds.
I think we need more programs like DeVeDeNG or something that is similar to Windows DVD for Linux. Which could be good programs for anyone who wants to get the job done quickly and doesn't care about personalizing every little thing.
We already have lots of programs that allows you to personalize everything. The problem I see with these programs is they are more complex, which means several issues. 1) It will take you longer to learn the program. 2) There is more things to go wrong. Therefor there will be more testing and diagnosing involved. Which means you will learn more things, perhaps. Keep in mind not everything you learn is will be beneficial when they decide to put out a newer version.
I'm not going to say that one is better then the other. It all depends on what you want your end product to be. Personally I just wanted to get the job done, and I don't care about personalizing every little thing. (If DeVeDeNG wasn't giving me issues the job would of been done.) On the other hand if my dad cared about personalizing it then I would care too. But my father isn't like that, He's the kind of person who likes efficiency. That's why I think a minimalistic program would be a better fit for us.