I have Telegram and Whatsapp with Contact Scopes enabled. When I want to message a new number from Whatsapp, I must first add a contact. That part is straightforward. But I still can't message that number, because it's not in the right scope. So I need to open the Contacts app, navigate to the relevant tag, search for the new contact, and add it to the tag. Now I can return to Whatsapp, find the contact in Whatsapp, and finally write my message.
This could be avoided if the contact editor had a way to add tags directly. When adding or editing a contact, it should be possible to add tags right there. Would this be feasible to implement?