The thing is, if you put the Maul scene anywhere other than at the very start, that implies it’s chronologically located between whatever two episodes are before and after it. Where it is, the “months earlier” makes it very apparent that it’s a flash forward - a “you’re probably wondering how we got here”-type device - whereas if you put it at the end of Death Watch or similar you’d have to have a “months later” before and a “months earlier” afterwards or something… and then presumably we’re going to see that footage again when it naturally comes up in the series anyway. I think the idea of using it as a pre-show framing device is fun but not entirely necessary, but pulling it only part of the way forward would just be really confusing. Bringing some order to the disorientating, unchronological order of the original show is one of the appeals of this restructuring for me.