If you are happy with your workflow you can continue as usual. In other work-cultures people might not like your approach which is why a draft PR can be helpful. Basically what this feature does is that it avoids having to point to a branch and tell your coworker that it is WIP that you want feedback on. Usually a PR will also show the changes directly.
Clearly not, otherwise I wouldn't have asked. :)
> It essentially formalizes a workflow like the one you describe.
How though? What do I gain by doing it this way that I can't already get? What's easier now? That's the part I'm not seeing.