the main characters are given arbitrary leadership roles that don’t suit their previous story-arcs
Lando being promoted to General in no time sticks out like a sore thumb.
Just throw in a line about the “battle of Taneb” or whatever and I’m sure the audience will buy it.
Seriously though, it’s not just Lando. Why are Han and Leia specifically leading the Endor ground team? They’ve never been established as “Seal team 6” commando types, and really this is something that ANY high-ranking rebel leader could do. It doesn’t utilize Leia’s diplomacy skills or Han’s smuggling skills. Not to mention, from the perspective of the Rebellion leadership, Han was last seen trying to leave the Rebellion to go pay off Jabba, and then spent the next year MIA frozen in carbonite. And now they’re putting him in charge of this super-critical mission? The overall problem is that ROTJ is the first time in Star Wars where the main characters’ involvement in the main story (at least after Act 1) seems contrived and unnatural.