[Matrix]

While network bulletins are rebroadcast elsewhere in the world, nowhere are they big raters and services like SBS and NHK BS are non-commercial and specialist - unlike BBC World News. It might seem like a simple idea, but there are too many commercial, editorial and logistical issues involved for it to be workable. Even small things, like clips of sporting events, would have to be done completely different if network bulletins were being broadcast on BBC World News.

I doubt Focus on Africa and Worklife India have been big raters on BBC WN in Europe. Perhaps as local shows in their own respective regions.
They seem very non-commercial and specialist, public service broadcasting in a sense, but for other regions than Europe.
If BBC (World) News want ratings they probably need to take a different path for prime time in Europe.

With one of the youngest demographics globally, and a growing economic voice, I'd argue that having a focus on Africa (see what I did there?) is never a bad thing, irrespective of your geographical base. BBC World News (as was), and indeed as it transitions to the new service, retains a core focus on business - amidst all of its other features. 

Arguably, something like Talking Movies would be a better candidate for moving to a streaming only option but it is about striking a balance and making assumptions on viewer trends--based entirely on geography--isn't the best way forward for an international news channel.