I don't think you should focus too much on that. Indeed, there is a "frontpage express" part, in it, but the app is still super useful should you remove that.

I've been prototyping a lot last year, and it was never straightforward because I have to compose with provided elements to build something looking a minimum like what I wanted.

Pingendo will allow me to do just that: quickly add, remove, switch components the fastest possible, and just focus on the product. This is the most important thing when wireframing.