I almost never use the filters that come with VS, yet they occupy a very prominent spot in the user interface. Out of perhaps 400 videos that I've now edited with VS, I used filters twice -- and it was a painful, tedious trial-by-error experience to figure them out.
I recommend that Corel creates some filter templates that can be drag-and-dropped onto the overlay tracks to streamline using a filter. For example, if I need to blur a license plate, I drag the template to the overlay track and stretch/shrink it to cover the time I need the plate obscured. A right click lets me adjust the size, placement, strength and motion of the effect.
I consider myself fairly competent with VS and probably have 60 hours of final edited product under my belt. But I can honestly say that I don't have the first idea of how to use a filter without stopping what I'm doing to research it. A streamlined way to use filters just might get me to use them... right now, I avoid them like sticky-fingered children and they annoy me by taking up space that could be used for something I actually would use. Some common filter templates would make filters more friendly.
Note that I'm not saying all
filters should have templates. Just start with one or two popular ones and see how it goes from there.