Whipping the Sauce: it's important to whip the tahini sauce during both stages of preparation, because otherwise it may not blend all the ingredients in or spread across the noodles as well. If you still find the sauce too thick to spread when you're adding it to the pasta, add another tablespoon of pasta water to the processor with the remaining sauce, and blend until re-whipped.
The Herbs: for those using supermarket herbs, make sure they're organic and consider buying an herb blend which has all the herbs you'd like in a bundle, to save a bit of money. You can't really replace any of the herbs with dried versions, as they'll have a different and much more concentrated flavors, so consider grabbing some from the grocer's next time you're there.
Freezing Tahini Pasta: you can freeze the pasta with vegan tahini sauce already on it for up to 6 months, or just the sauce in an air-tight container for up to one year.