@Bob_Le_Schoenthal - I merged your post into a similar thread. You call out two separate asks: multiple brief/docs per project and brief/doc templates. This new thread covers the first request. The second request is covered in this thread:
Please consider giving both threads a vote (and you can split your original post over the two threads, if so desired. I believe there may be some features coming in the coming months that might help on this as well, but we’ll have to wait for the public announcements to determine if they’re helpful for you.