Yeah I think this goes into the category of:
Patient: "Doctor, when I bend my arm backward, it hurts!"
Doctor: "Stop doing that."
So:
- don't issue pull requests for multiple projects
- don't keep mental track of the status of those pull requests.
- don't worry about breaking clients
- don't worry about the logistical/scheduling issues of multiple teams
?
And if you're having a tough time deploying changes, it sounds like you're not practicing continuous delivery, which as Fowler said is a prerequisite.