With this new order of scenes, I think the second DS2 scene (where the Emperor arrives) would work better between Luke's talk to Ben and the droids' walk up to Jabba's castle. Placed there, it dramatically builds on the things Yoda and Ben have said.

If it's kept back until after Jabba's barge blows up and just drops in between Tatooine and the Rebel convoy/briefing, it won't feel connected to the things Luke learns on Degobah. Moving it has another benefit, I think, because I believe the pace will work better if the action moves straight from Tatooine to the Rebels. The briefing catches us all up on the DS2 situation anyway-- the Emperor scene won't be missed at that point.