Yes, I agree. There's no doubt about that.
Most of Disney's direct to video sequels have been pure garbage.
And on top of that, most of them have had horrible animation.
The Hunchback of Notre Dame 2 was garbage, and it looked hideous. The opening shot (a POV shot looking inside a huge bell) looked like it was animated by someone still in school. The perspective changes in the shot were terrible and distracting.
The good news is, as you noted, that Disney has stopped doing DTV sequels. The Little Mermaid 3 was the last one.
The Tinker Bell movies are in a different category. But I have seen them (except the most recent one) and the stories have been pretty good. John Lasseter has made sure that they treat these movies with respect.
The point is, this is Pixar we're talking about. Just becuase they are making a couple of sequels doesn't mean that they have run out of ideas. Regardless of why they are making them, the important thing is that they will make a quality project.
They killed themselves to get Toy Story 2 delivered on time pushing animators to their limits by adding special effects and changing story elements even after much of it was animated.
And I still shutter to think that if they hadn't taken the time to fix things, instead of Jessie, today we would have Senorita Cactus.
And last I heard, something similar is happening with Cars 2. Originally, Lasseter was not going to direct it, but then he went to help work on the story problems, so who knows? Now he might very well have a director credit on the film, and perhaps the storyline has changed since the last time we heard about the premise.
As I said before, some people would LOVE to see these characters come back in new stories.
That was one of the many issues of Disney's DTV sequels, nobody wanted to see a sequel to films like Lady and the Tramp or Cinderella.
So, I don't have a problem with Pixar making a couple of sequels.
Still, its a shame about Newt.