Approval Workflows share with group and teams

I am very frustrated by the lack of sharing ability with the Approval Workflows. 

why is the functionality limited to either a specific person, or the entire company? 

so either i spend time selecting the exact users for over 400 different workflows. OR i share it with the entire instance and everyone has access to everything in a giant never ending list? 

We need to be able to share with specific groups and specific teams, Exactly the same way that all the other sharing permissions operate.