The more I watch ROTJ the more I wish someone would A) redub Yoda's earlier lines so they sound more like Yoda and B) replace Michael Pennington's performance altogether and with someone more like Tarkin (not Tarkin naturally but like a younger version of him).
JerJerrod is so mincing and cowardly (not the actor's fault, that's the way he is written).
When Vader throws his weight around in ESB the officers react with dignity, efficiency and even a degree of snide inter-rank ambition.
That makes Darth's often arbitrary and frequently fatal discipline so effective.
These are real officers dealing with an enforcer with an unpredictable fuse.
Jerjerrod in the earlier draughts is much more haughty, aware of Vader's recent failures and willing to exploit them for personal advancement.
There isn't much in the way of room to put all of that into the film but if it were possible to replace him with someone more confident it could show Vader as being a position where he has to prove himself to the Emperor or be bold enough to stand up to him.