Yeah, that’s the way to do it.
As a standard, we work in 5.1 for all our projects.
I know some of my colleagues work in Atmos by default, but I personally find that to be overkill.
At the start of a project, you usually know whether it’s intended for Netflix or similar platforms.
Regular broadcast is 5.1 at best, while cinema is a different story.
Even then, you’re generally aware from the outset whether the final deliverable will be 5.1, 7.1, or Atmos.
Whenever one of our projects gets upgraded from 5.1 to Atmos, we simply load all the tracks into our Atmos template.
It’s a completely different workflow anyway, so you end up redoing quite a bit regardless.
Don’t get me wrong—there are plenty of good reasons to work in Atmos from the start.
On the other hand, there are just as many reasons to keep things simple, as I described above.
I’d say: Multiple templates that fully are compatible.
We have different templates for Dialog Edit, BG cutting, ADR recording, etc… They all load flawless within our Mixing Template. And as far as ADR goes, I find it a real PITA to record ADR in 5.1.
Good luck!
Fredo