With static issues I'm not sure I'm yet sold on dosing into the portafilter. I went from a Vario W to a Niche myself and still have a similar workflow.
I tried the Vario many times as a single doser, weighing beans out and letting them all run through, skipping the whole point of the -W as a weighing device. But depending on the coffee, I'd sometimes get terrible static and watch the grind hurl itself across the workspace. So I resigned to usign the -W function with the catcher in place, and learned to not care too much. It added a step but stopped the static issues. I would let it grind in there, then dump it into the portafilter over the sink just in case a little spills out.
Enter the Niche. Still weighing the beans before grinding, and using a catcher (their stainless 58mm cup this time). Tried going straight to the portafilter directly but again, coffee dependent, could get a lot of static. Even with a couple (up to 3) mists of water for the "RDT" technique, I would still have static. So now I have resigned to using their catcher and again dump into the portafilter over the sink.
You may have better luck, many people do. I'd consider just using the Vario as intended and get a ring to go around the portafilter to make it easier to get everything in it. Or if you get a Niche or something else be ready that you might still need to do that, and you may have obtained an upgrade in grinding but not necessarily have changed or sped up your workflow.
As for Niche vs. Vario, I like the change, but I can't honestly say it has made a difference in my cup. But I'm not nearly as astute as some folks. I won't undo my upgrade but I'm not sure I'd do it again.