Well, in a sense you could see Paragraphic as what the ideas in Patternodes have evolved into. Paragraphic uses a very similar system for design and pattern generation, but presented in a different way. I think the main use case will be as a companion tool for complex/parametric vector designs.

Then I also want to put in some more apparent usecases like making custom vector halftones, gradients, data visualizations or maybe animations. So I can have some more specific things to motive designers to try something new (and hopefully then see what else they can do with the apps).

I think what you're describing is pretty much what I want to do with my apps: Getting designers new ways to think about patterns and design by introducing parametric/procedural features in a more accessible package. So that's pretty much the long term goal.

No, I'm sorry, there's no automatic way to "complete" your bundle in this way. A couple of times I've made specific offers to existing users of the apps to get the others at a reduced price, but I don't want to spam people with e-mail offers too often. But maybe I should give that a try again.