I said "better 'deceive' option," by which I meant a long-term deception like taking over a kingdom by becoming the queen, or breaking a spy ring by becoming one of their members. When you're running a deception like that, DPR isn't really a consideration. I get the idea that your games are pretty much combat-oriented. In the Contagion thread you said that "plot" spells like Dausuul's Contagion should not even be in the PHB, and using Magic Jar to run a long-lasting deception is pretty much on par with Dausuul's Contagion, so I expect in your games you'd call Magic Jar usages like the above a "plot spell" which you wouldn't do. Dominate Person will then be superior for you, for the reasons you listed and the fact that it's cheaper to cast, and that the downside isn't a downside for you. That's what I meant by "at least [Dominate Person]'s useful for short-term hijinks."