Your point about Kylo and Palps doesn’t really apply to the theatrical. Kylo doesn’t know Palps wants to be killed, and thus doesn’t know whether it means obeying Palps or not. This problem kinda exists in Ascendant, as Palps warns Kylo about the spirit stuff - I understand that decision and do like it in theory, it raises the stakes… but… yeah.

If I were in charge of the movie, I’d have Palps urge Kylo to kill him only in anger and hatred specifically, and during the hangar scene when Kylo proposes to Rey the killing quote would be changed to this: “We’ll kill him, but not out of anger, not out of hatred. Then we’ll take the throne.”

Again, Kylo doesn’t know about and hasn’t even seen the Sith throne specifically. If the movie actually showed us Kylo Ren himself discovering the actual Sith throne, then I would see your point.