I can’t say much, as this is in the earliest possible phase, but I intend to revamp these so that all three films are primarily sourced from the 19SE.
For ANH and ESB, especially the former, there will be a few things that could be a little tricky to adapt from the work done using the 2011 BluRay source. But I think none of these will be showstoppers.
While on the subject, let me ask: would anyone like to remove Yavin IV from the SE shot of the rebel force heading to the Death Star?