Actually I think the reason he kept most of the ESB effects is that they weren't that bad. Later on in the OT SE less CGI is needed to recreate effects because of the (then) new technological advancements used in creating the original effects. After all, they did learn new things while creating the movies.

Ady, think you could add some starships to cloud city? There aren't any ships other than the Falcon and some cloud cars.

Also, I noticed there are no (or hardly any) Mon Calamari cruisers (like the ones that appeared in Episode VI) in the end scenes. Don't mind adding some of those? Other than the medical frigate all I'm really seeing are the same rebel transports present at Hoth...