Valid concerns, though I think the benefit of making this some anonymous figure would be that he isn’t a bigger character; he’s a much smaller one. New dialogue could help clarify this, as well as sell the connectivity to Palpatine’s contingency plans that has been in the official lore all along but the movies don’t spell out well. Sure, there would still be the question of why this dude is hanging from the ceiling, but if he’s just some servant I think weird details like that would be much easier to accept as harmless speculation fodder.