I hate drawing comparisons between applications because I believe it's utterly unfair in most cases. This is not one of those cases. I believe wholeheartedly that we've reached a stage of computing where we can get rid of the "Preview" button in the effects panels. Let's do it. I've not seen a solid step forward in how effects are created, previewed, edited, and handled since I began using Adobe apps in CS4. Affinity is doing this. And it's buttery smooth. And I'm both jealous and confused that Adobe doesn't have this. It's the sort of thing that you remain blissfully ignorant about until you use it and then you begin to question everything you know about the world when you go back. All the best :)