Finch campaign structure provides a lot of power for optimizing your ad copy. You have a lot of control with the ability to increase your click through rate (CTR) and quality score for all of your keywords. This added power means there is some extra work to do to manage ads with Finch, but AdWords Editor provides an easy way to manage your ads.
Read the steps for Adding new ads to all ad groups with AdWords Editor. (You can find this paper on the Finch website under Product Materials > Resources.)