Well the timeline idea is interesting except that I don't agree. I have the literal opposite perspective. I think if we got a side story it would be the Elpis visit timeline continued after we left and we got to see what an informed Venat actually did. I think the Elpis visit is the weird timeline you are talking about but it was simply cut off to avoid messing with the MSQ. Which is why I think it would be cool if it wasn't cut off and had nothing to do with MSQ. But if that happened you would not have the context of the Hydaelyn trial, the ending moment with Emet and Hythlo, the raids, etc so they transplanted it into the MSQ for those bonuses.
This is also a huge issue with the very first post ITT. Because we are literally never shown Venat "not lifting a finger", it is simply assumed to be the case because people assume the Elpis visit is the original msq timeline.