As much as I loathe Chuck Wendig he did introduce a concept that I liked into his "Aftermath" book that said that the remnants of the Empire would never go to war again with *just* military might, no matter how mighty their military might be. After the Empire/Rebellion conflict they determined that as long as the Rebels had the Force on their side their technological terrors would always fall.
To be fair, what we saw onscreen in TROS renders ANY type of military might totally redundant. I mean at the point that Palps can single-handedly take down seemingly several thousand ships simultaneously - from several miles away - who needs
anything?
They should just strap Palps on the front of a single TIE fighter and fly everywhere, blasting planets, militaries, entire peoples into submission.
In ROTJ , I got that Palps was scary and a threat and had some witchy powers, but I would never have assumed that he could look out the window and blast the entire rebel fleet out of commission. To me, the whole stakes of the struggle kind of go out the window at that point. Like rebels saying "why bother?"
It's an issue with the wider ("new") force-type realities in TROS - who needs a DS1 type attack or even the Holdo manuever (whoa - LAME attempt to sidestep that prickly issue, right?) when force users can throw ships around without huge effort and Sith dudes can blast thousands of ships out of the sky?
So to answer your question I would say that Palps didn't unleash all of his planet killing Star Destroyers because he himself wasn't ready to participate "in the flesh" yet.
I love the idea of Exogol being some sort of pocket dimension *within* the SW equivalent of "hell."
I still don't get why - given he's so MASSIVELY powerful in TROS - he couldn't have done all this ten years (or more) earlier. Yeah, Rey's body is a nice force-y upgrade but he doesn't NEED it to wipe the floor with the rebellious fleet, or even toss out Palpie zingers and smirks, right? He seems like he literally could "take on the whole Empire myself" - and win, easily.
And I gotta get this out there - threats, stakes and hypotheticals aside, the idea of Palps literally in Rey's body (esp. 5-year old Rey) is kinda funny - it could have been completely silly had it happened onscreen, especially as she cackles and calls her self "Empress Palpatine" and starts leering and doing Palps stuff. And all the troops would be like... "wtf - it's Palps in heels?"
It's kinda weird too that he announces to everyone what's going to happen "she 'kills' me, then I jump into her body, and you take orders from her - because it'll be me." So no use just having her be a slightly evil Rey - it'd be full-on party-Palps but coming through Rey.
And it's hard to have your cake and eat it too - I can accept a RO Vader castle or a Sith temple in some kind of hell in space, but when you're talking about tens of thousands of regular military personnel - grunts, officer, designers, scientists etc - living in dorms or whatever for years or decades, doing mundane stuff (building, arguing, pooping, having kids - there were female Imperials in TROS) that's where you start to lose me.
I'd say he's the living person we met in the prior films, the same one who sired Rey's father before his PT/OT body was tossed over the railing and blasted into blue flame. Then where it starts to get really interesting is when you consider whether his more elaborate explanation to Rey of why he wanted her to strike him down (ie so he could possess her) *also* applied to Luke in ROTJ and whether that *also* means he's been tricking *all* of his prior apprentices (including the one who thought he was murdering Plagueis!) into "striking him down" as well.
So you are of the opinion that the Palps entity we see in TROS is the still-living (if only just barely) person we saw in ROTJ, who somehow escaped DSII before it blew?
I just can't wait to see this freaking movie again.
For once in the ST, I'm with you on that.