Would the Dagobah scene where Yoda confirms that Vader is Luke’s father be kept in this altered storyline?
To keep prequel continuity yes. Theoretically this would leave in Luke going to Dagobah and only alter the space battle, jabba subtitles, disguised leah subtitles, jabba palace outside shots and possibly outside shots of the attempted execution, and the space battle. Some minor changes throughout would be needed and scenes rearranged and spliced but that’s the main idea.